Remove superfluously duplicated code in public/api/report-commits.php.

[WebKit-https.git] / Websites / perf.webkit.org / ChangeLog

2014-10-08  Ryosuke Niwa  <rniwa@webkit.org>

        Remove superfluously duplicated code in public/api/report-commits.php.

2014-10-08  Ryosuke Niwa  <rniwa@webkit.org>

        Perf dashboard should store commit logs
        https://bugs.webkit.org/show_bug.cgi?id=137510

        Reviewed by Darin Adler.

        For the v2 version of the perf dashboard, we would like to be able to see commit logs in the dashboard itself.

        This patch replaces "build_revisions" table with "commits" and "build_commits" relations to store commit logs,
        and add JSON APIs to report and retrieve them. It also adds a tools/pull-svn.py to pull commit logs from
        a subversion directory. The git version of this script will be added in a follow up patch.


        In the new database schema, each revision in each repository is represented by exactly one row in "commits"
        instead of one row for each build in "build_revisions". "commits" and "builds" now have a proper many-to-many
        relationship via "build_commits" relations.

        In order to migrate an existing instance of this application, run the following SQL commands:

        BEGIN;

        INSERT INTO commits (commit_repository, commit_revision, commit_time)
            (SELECT DISTINCT ON (revision_repository, revision_value)
                revision_repository, revision_value, revision_time FROM build_revisions);

        INSERT INTO build_commits (commit_build, build_commit) SELECT revision_build, commit_id
            FROM commits, build_revisions
            WHERE commit_repository = revision_repository AND commit_revision = revision_value;

        DROP TABLE build_revisions;

        COMMIT;


        The helper script to submit commit logs can be used as follows:

        python ./tools/pull-svn.py "WebKit" https://svn.webkit.org/repository/webkit/ https://perf.webkit.org
            feeder-slave feeder-slave-password 60 "webkit-patch find-users"

        The above command will pull the subversion server at https://svn.webkit.org/repository/webkit/ every 60 seconds
        to retrieve at most 10 commits, and submits the results to https://perf.webkit.org using "feeder-slave" and
        "feeder-slave-password" as the builder name and the builder password respectively.

        The last, optional, argument is the shell command to convert a subversion account to the corresponding username.
        e.g. "webkit-patch find-users rniwa@webkit.org" yields "Ryosuke Niwa" <rniwa@webkit.org> in the stdout.


        * init-database.sql: Replaced "build_revisions" relation with "commits" and "build_commits" relations.

        * public/api/commits.php: Added. Retrieves a list of commits based on arguments in its path of the form
            /api/commits/<repository-name>/<filter>. The behavior of this API depends on <filter> as follows:

            - Not specified - It returns every single commit for a given repository.
            - Matches "oldest" - It returns the commit with the oldest timestamp.
            - Matches "latest" - It returns the commit with the latest timestamp.
            - Matches "last-reported" - It returns the commit with the latest timestamp added via report-commits.php.
            - Is entirely alphanumeric - It returns the commit whose revision matches the filter.
            - Is of the form <alphanumeric>:<alphanumeric> or <alphanumeric>-<alphanumeric> - It retrieves the list
            of commits added via report-commits.php between two timestamps retrieved from commits whose revisions
            match the two alphanumeric values specified. Because it retrieves commits based on their timestamps,
            the list may contain commits that do not appear as neither hash's ancestor in git/mercurial.
        (main):
        (commit_from_revision):
        (fetch_commits_between):
        (format_commits):

        * public/api/report-commits.php: Added. A JSON API to report new subversion, git, or mercurial commits.
        See tests/api-report-commits.js for examples on how to use this API.

        * public/api/runs.php: Updated the query to use "commit_builds" and "commits" relations instead of
        "build_revisions". Regrettably, the new query is 20% slower but I'm going to wait until the new UI is ready
        to optimize this and other JSON APIs.

        * public/include/db.php:
        (Database::select_or_insert_row):
        (Database::update_or_insert_row): Added.
        (Database::_select_update_or_insert_row): Extracted from select_or_insert_row. Try to update first and then
        insert if the update fails for update_or_insert_row. Preserves the old behavior when $should_update is false.

        (Database::select_first_row):
        (Database::select_last_row): Added.
        (Database::select_first_or_last_row): Extracted from select_first_row. Fixed a bug that we were asserting
        $order_by to be not alphanumeric/underscore. Retrieve the last row instead of the first if $descending_order.

        * public/include/report-processor.php:
        (ReportProcessor::resolve_build_id): Store commits instead of build_revisions. We don't worry about the race
        condition for adding "build_commits" rows since we shouldn't have a single tester submitting the same result
        concurrently. Even if it happened, it will only result in a PHP error and the database will stay consistent.

        * run-tests.js:
        (pathToTests): Don't call path.resolve with "undefined" testName; It throws an exception in the latest node.js.

        * tests/api-report-commits.js: Added.
        * tests/api-report.js: Fixed a test per build_revisions to build_commits/commits replacement.

        * tools: Added.
        * tools/pull-svn.py: Added. See above for how to use this script.
        (main):
        (determine_first_revision_to_fetch):
        (fetch_revision_from_dasbhoard):
        (fetch_commit_and_resolve_author):
        (fetch_commit):
        (textContent):
        (resolve_author_name_from_email):
        (submit_commits):

2014-09-30  Ryosuke Niwa  <rniwa@webkit.org>

        Update Install.md for Mavericks and fix typos
        https://bugs.webkit.org/show_bug.cgi?id=137276

        Reviewed by Benjamin Poulain.

        Add the instruction to copy php.ini to enable the Postgres extension in PHP.

        Also use perf.webkit.org as the directory name instead of WebKitPerfMonitor.

        Finally, init-database.sql is no longer located inside database directory.

        * Install.md:

2014-08-11  Ryosuke Niwa  <rniwa@webkit.org>

        Report run id's in api/runs.php for the new dashboard UI
        https://bugs.webkit.org/show_bug.cgi?id=135813

        Reviewed by Andreas Kling.

        Include run_id in the generated JSON.

        * public/api/runs.php:
        (fetch_runs_for_config): Don't sort results by time since that has been done in the front end for ages now.
        (format_run):

2014-08-11  Ryosuke Niwa  <rniwa@webkit.org>

        Merging platforms mixes baselines and targets into reported data
        https://bugs.webkit.org/show_bug.cgi?id=135260

        Reviewed by Andreas Kling.

        When merging two platforms, move test configurations of a different type (baseline, target)
        as well as of different metric (Time, Runs).

        Also avoid fetching the entire table of runs just to see if there are no remaining runs.
        It's sufficient to detect one such test_runs object.

        * public/admin/platforms.php:
        (merge_platforms):

2014-07-30  Ryosuke Niwa  <rniwa@webkit.org>

        Merging platforms mixes baselines and targets into reported data
        https://bugs.webkit.org/show_bug.cgi?id=135260

        Reviewed by Geoffrey Garen.

        Make sure two test configurations we're merging are of the same type (e.g. baseline, target, current).
        Otherwise, we'll erroneously mix up runs for baseline, target, and current (reported values).

        * public/admin/platforms.php:

2014-07-23  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix after r171361.

        * public/js/helper-classes.js:
        (.this.formattedBuildTime):

2014-07-22  Ryosuke Niwa  <rniwa@webkit.org>

        Perf dashboard spends 2s processing JSON data during the page loads
        https://bugs.webkit.org/show_bug.cgi?id=135152

        Reviewed by Andreas Kling.

        In the Apple internal dashboard, we were spending as much as 2 seconds
        converting raw JSON data into proper JS objects while loading the dashboard.

        This caused the apparent unresponsiveness of the dashboard despite of the fact
        charts themselves updated almost instantaneously.

        * public/index.html:
        * public/js/helper-classes.js:
        (TestBuild): Compute the return values of formattedTime and formattedBuildTime
        lazily as creating new Date objects and running string replace is expensive.
        (TestBuild.formattedTime):
        (TestBuild.formattedBuildTime):
        (PerfTestRuns.setResults): Added. Pushing each result was the biggest bottle neck.
        (PerfTestRuns.addResult): Deleted.

2014-07-18  Ryosuke Niwa  <rniwa@webkit.org>

        Perf dashboard shouldn't show the full git hash
        https://bugs.webkit.org/show_bug.cgi?id=135083

        Reviewed by Benjamin Poulain.

        Detect Git/Mercurial hash by checking the length.

        If it's a hash, use the first 8 characters in the label
        while retaining the full length to be used in hyperlinks.

        * public/js/helper-classes.js:
        (.this.formattedRevisions):
        (TestBuild):

2014-05-29  Ryosuke Niwa  <rniwa@webkit.org>

        Add an instruction on how to backup the database.
        https://bugs.webkit.org/show_bug.cgi?id=133391

        Rubber-stamped by Andreas Kling.

        * Install.md:

2014-04-08  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix after r166479. 'bytes' is now abbreviated as 'B'.

        * public/js/helper-classes.js:
        (PerfTestRuns.smallerIsBetter):

2014-04-08  Ryosuke Niwa  <rniwa@webkit.org>

        Some CSS teaks.

        * public/common.css:
        (#title):
        * public/index.html:
        (#charts .pane):
        (#charts .arrow):

2014-04-03  Ryosuke Niwa  <rniwa@webkit.org>

        WebKitPerfMonitor: There should be a way to add all metrics of a suite without also adding subtests
        https://bugs.webkit.org/show_bug.cgi?id=131157

        Reviewed by Andreas Kling.

        Split "all metrics" into all metrics of a test suite and all subtests of the suite.
        This allows, for example, adding all metrics such as Arithmetic and Geometric for
        a given test suite without also adding its subtests.

        * public/index.html:
        (init.showCharts):
        (init):

2014-04-03  Ryosuke Niwa  <rniwa@webkit.org>

        WebKitPerfMonitor: Tooltips cannot be pinned after using browser's back button
        https://bugs.webkit.org/show_bug.cgi?id=131155

        Reviewed by Andreas Kling.

        The bug was caused by Chart.attach binding event listeners on plot container on each call.
        This resulted in the click event handler toggling the visiblity of the tooltip twice upon
        click when attach() has been called even number of times, keeping the tooltip invisible.

        Fixed the bug by extracting the code to bind event listeners outside of Chart.attach as
        a separate function, bindPlotEventHandlers, and calling it exactly once when Chart.attach
        is called for the first time.

        * public/index.html:
        (Chart.attach):
        (Chart..bindPlotEventHandlers):

2014-04-03  Ryosuke Niwa  <rniwa@webkit.org>

        WebKitPerfMonitor: Tooltips can be cut off at the top
        https://bugs.webkit.org/show_bug.cgi?id=130960

        Reviewed by Andreas Kling.

        * public/common.css:
        (#title): Removed the gradients, box shadows, and border from the header.
        (#title h1): Reduce the font size.
        (#title ul): Use line-height to vertically align the navigation bar instead of specifying a padding atop.
        * public/index.html:
        (.tooltop:before): Added. Identical to .tooltop:after except it's upside down (arrow facing up).
        (.tooltip.inverted:before): Show the arrow facing up when .inverted is set.
        (.tooltip.inverted:before): Hide the arrow facing down when .inverted is set.
        * public/js/helper-classes.js:
        (Tooltip.show): Show the tooltip below the point if placing it above the point results in the top of the
        tooltip extending above y=0.

2014-04-03  Ryosuke Niwa  <rniwa@webkit.org>

        WebKitPerfMonitor: Y-axis adjustment is too aggressive
        https://bugs.webkit.org/show_bug.cgi?id=130937

        Reviewed by Andreas Kling.

        Previously, adjusted min. and max. were defined as the two standards deviations away from EWMA of measured
        results. This had two major problems:
        1. Two standard deviations can be too small to show the confidence interval for results.
        2. Sometimes baseline and target can be more than two standards deviations away.

        Fixed the bug by completely rewriting the algorithm to compute the interval. Instead of blindly using two
        standard deviations as margins, we keep adding quarter the standard deviation on each side until more than 90%
        of points lie in the interval or we've expanded 4 standard deviations. Once this condition is met, we reduce
        the margin on each side separately to reduce the empty space on either side.

        A more rigorous approach would involve computing least squared value of results with respect to intervals
        but that seems like an overkill for a simple UI problem; it's also computationally expensive.

        * public/index.html:
        (Chart..adjustedIntervalForRun): Extracted from computeYAxisBoundsToFitLines.
        (Chart..computeYAxisBoundsToFitLines): Compute the min. and max. adjusted intervals out of adjusted intervals
        for each runs (current, baseline, and target) so that at least one point from each set of results is shown.
        We wouldn't see the difference between measured values versus baseline and target values otherwise.
        * public/js/helper-classes.js:
        (PerfTestResult.unscaledConfidenceIntervalDelta): Returns the default value if the confidence
        interval delta cannot be computed.
        (PerfTestResult.isInUnscaledInterval): Added. Returns true iff the confidence intervals lies
        within the given interval.
        (PerfTestRuns..filteredResults): Extracted from unscaledMeansForAllResults now that PerfTestRuns.min and
        PerfTestRuns.max need to use both mean and confidence interval delta for each result.
        (PerfTestRuns..unscaledMeansForAllResults):
        (PerfTestRuns.min): Take the confidence interval delta into account.
        (PerfTestRuns.max): Ditto.
        (PerfTestRuns.countResults): Returns the number of results in the given time frame (> minTime).
        (PerfTestRuns.countResultsInInterval): Returns the number of results whose confidence interval lie within the
        given interval.
        (PerfTestRuns.exponentialMovingArithmeticMean): Fixed the typo so that it actually computes the EWMA.

2014-03-31  Ryosuke Niwa  <rniwa@webkit.org>

        Some CSS tweaks after r166477 and r166479,

        * public/index.html:

2014-03-30  Ryosuke Niwa  <rniwa@webkit.org>

        WebKitPerfMonitor: Sometimes text inside panes overlap
        https://bugs.webkit.org/show_bug.cgi?id=130956

        Reviewed by Gyuyoung Kim.

        Revamped the pane UI. Now build info uses table element instead of plane text with BRs. The computed status of
        the latest result against baseline/target such as "3% until target" is now shown above the current value. This
        reduces the total height of the pane and fits more information per screen capita on the dashboard.

        * public/index.html: Updated and added a bunch of CSS rules for the new look.
        (.computeStatus): Don't append the build info here. The build info is constructed as a separate table now.
        (.createSummaryRowMarkup): Use th instead of td for "Current", "Baseline", and "Target" in the summary table.
        (.buildLabelWithLinks): Construct table rows instead of br separated lines of text. This streamlines the look
        of the build info shown in a chart pane and a tooltip.
        (Chart): Made .status a table.
        (Chart.populate): Prepend status.text, which contains text such as "3% until target", into the summary rows
        right above "Current" value, and populate .status with buildLabelWithLinks manually instead of status.text
        now that status.text no longer contains it.
        (Chart..showTooltipWithResults):  Wrap buildLabelWithLinks with a table element.

        * public/js/helper-classes.js:
        (TestBuild.formattedRevisions): Don't include repository names in labels since repository names are now added
        by buildLabelWithLinks inside th elements. Also place spaces around '-' between two different OS X versions.
        e.g. "OS X 10.8 - OS X 10.9" instead of "OS X 10.8-OS X 10.9".
        (PerfTestRuns): Use "/s" for "runs/s" and "B" for "bytes" to make text shorter in .status and .summaryTable.
        (PerfTestRuns..computeScalingFactorIfNeeded): Avoid placing a space between 'M' and a unit starting with a
        capital letter; e.g. "MB" instead of "M B".

2014-03-30  Ryosuke Niwa  <rniwa@webkit.org>

        WebKitPerfMonitor: Header and number-of-days slider takes up too much space
        https://bugs.webkit.org/show_bug.cgi?id=130957

        Reviewed by Gyuyoung Kim.

        Moved the slider into the header. Also reduced the spacing between the header and platform names.
        This reclaims 50px × width of the screen real estate.

        * public/common.css:
        (#title): Reduced the space below the header from 20px to 10px.
        * public/index.html:
        (#numberOfDaysPicker): Removed the rounded border around the number-of-days slider.
        (#dashboard > tbody > tr > td): Added a 1.5em padding at the bottom.
        (#dashboard > thead th): That allows us to remove the padding at the top here. This reduces the wasted screen
        real estate between the header and the platform names.

2014-03-10  Zoltan Horvath  <zoltan@webkit.org>

        Update the install guidelines for perf.webkit.org
        https://bugs.webkit.org/show_bug.cgi?id=129895

        Reviewed by Ryosuke Niwa.

        The current install guideline for perf.webkit.org discourages the use of the installed
        Server application. I've actualized the documentation for Mavericks, and modified the
        guideline to include the instructions for Server.app also.

        * Install.md:

2014-03-08  Zoltan Horvath  <zoltan@webkit.org>

        Update perf.webkit.org json example
        https://bugs.webkit.org/show_bug.cgi?id=129907

        Reviewed by Andreas Kling.

        The current example is not valid json syntax. I fixed the syntax errors and indented the code properly.

        * ReadMe.md:

2014-01-31  Ryosuke Niwa  <rniwa@webkit.org>

        Merge database-common.js and utility.js into run-tests.js.

        Reviewed by Matthew Hanson.

        Now that run-tests is the only node.js script, merged database-common.js and utility.js into it.
        Also moved init-database.sql out of the database directory and removed the directory entirely.

        * database: Removed.
        * database/database-common.js: Removed.
        * database/utility.js: Removed.
        * init-database.sql: Moved from database/init-database.sql.
        * run-tests.js:
        (connect): Moved from database-common.js.
        (pathToDatabseSQL): Extracted from pathToLocalScript.
        (pathToTests): Moved from database-common.js.
        (config): Ditto.
        (TaskQueue): Ditto.
        (SerializedTaskQueue): Ditto.
        (main):
        (initializeDatabase):
        (TestEnvironment.it):
        (TestEnvironment.queryAndFetchAll):
        (sendHttpRequest):

2014-01-30  Ryosuke Niwa  <rniwa@webkit.org>

        Remove the dependency on node.js from the production code.

        Reviewed by Ricky Mondello.

        Work towards <rdar://problem/15955053> Upstream SafariPerfMonitor.

        Removed node.js dependency from TestRunsGenerator. It was really a design mistake to invoke node.js from php.
        It added so much complexity with only theoretical extensibility of adding aggregators.  It turns out that
        many aggregators we'd like to add are a lot more complicated than ones that could be written under the current
        infrastructure, and we need to make the other aspects (e.g. the level of aggregations) a lot more extensible.
        Removing and simplifying TestRunsGenerator allows us to implement such extensions in the future.

        Also removed the js files that are no longer used.

        * config.json: Moved from database/config.json.
        * database/aggregate.js: Removed. No longer used.
        * database/database-common.js: Removed unused functions, and updated the path to config.json.
        * database/process-jobs.js: Removed. No longer used.
        * database/sample-data.sql: Removed. We have a much better corpus of data now.
        * database/schema.graffle: Removed. It's completely obsolete.
        * public/include/db.php: Updated the path to config.json.
        * public/include/evaluator.js: Removed.

        * public/include/report-processor.php:
        (TestRunsGenerator::aggregate): Directly aggregate values via newly added aggregate_values method instead of
        storing values into $expressions and calling evaluate_expressions_by_node.
        (TestRunsGenerator::aggregate_values): Added.
        (TestRunsGenerator::compute_caches): Directly compute the caches.

2014-01-30  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Don't fail the platform merges even if there are no test configurations to be moved to the new platform.

        * public/admin/platforms.php:
        * public/include/db.php:

2014-01-30  Ryosuke Niwa  <rniwa@webkit.org>

        Zoomed y-axis view is ununsable when the last result is an outlier.

        Reviewed by Stephanie Lewis.

        Show two standard deviations from the exponential moving average with alpha = 0.3 instead of the mean of
        the last result so that the graph looks sane if the last result was an outlier. However, always show
        the last result's mean even if it was an outlier.

        * public/index.html:
        * public/js/helper-classes.js:
        (unscaledMeansForAllResults): Extracted from min/max/sampleStandardDeviation.
        Also added the ability to cache the unscaled means to avoid recomputation.
        (PerfTestRuns.min): Refactored to use unscaledMeansForAllResults.
        (PerfTestRuns.max): Ditto.
        (PerfTestRuns.sampleStandardDeviation): Ditto.
        (PerfTestRuns.exponentialMovingArithmeticMean): Added.

2014-01-30  Ryosuke Niwa  <rniwa@webkit.org>

        Minor fixes.

        * public/admin/tests.php:
        * public/js/helper-classes.js:

2014-01-29  Ryosuke Niwa  <rniwa@webkit.org>

        Use two standard deviations instead as I mentioned in the mailing list.

        * public/index.html:

2014-01-28  Ryosuke Niwa  <rniwa@webkit.org>

        The performance dashboard erroneously shows upward arrow for combined metrics.

        A single outlier can ruin the zoomed y-axis view.

        Rubber-stamped by Antti Koivisto.

        * public/index.html:
        (computeYAxisBoundsToFitLines): Added adjustedMax and adjustedMin, which are pegged at 4 standard deviations
        from the latest results' mean.
        (Chart): Renamed shouldStartYAxisAtZero to shouldShowEntireYAxis.
        (Chart.attachMainPlot): Use the adjusted max and min when we're not showing the entire y-axis.
        (Chart.toggleYAxis):
        * public/js/helper-classes.js:
        (PerfTestRuns.sampleStandardDeviation): Added.
        (PerfTestRuns.smallerIsBetter): 'Combined' is a smaller is better metric.

2014-01-28  Ryosuke Niwa  <rniwa@webkit.org>

        Don't include the confidence interval when computing the y-axis.

        Rubber-stamped by Simon Fraser.

        * public/js/helper-classes.js:
        (PerfTestRuns.min):
        (PerfTestRuns.max):

2014-01-25  Ryosuke Niwa  <rniwa@webkit.org>

        Tiny CSS tweak for tooltips.

        * public/index.html:

2014-01-25  Ryosuke Niwa  <rniwa@webkit.org>

        Remove the erroneously repeated code.

        * public/admin/test-configurations.php:

2014-01-24  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/15704893> perf dashboard should show baseline numbers

        Reviewed by Stephanie Lewis.

        * public/admin/bug-trackers.php:
        (associated_repositories): Return an array of HTMLs instead of echo'ing as expected by AdministrativePage.
        Also fixed a typo.

        * public/admin/platforms.php:
        (merge_list): Ditto.

        * public/admin/test-configurations.php: Added.
        (add_run): Adds a "synthetic" test run and a corresponding build. It doesn't create run_iterations and
        build_revisions as they're not meaningful for baseline / target numbers.
        (delete_run): Deletes a synthetic test run and its build. It verifies that the specified build has exactly
        one test run so that we don't accidentally delete a reported test run.
        (generate_rows_for_configurations): Generates rows of configuration IDs and types.
        (generate_rows_for_test_runs): Ditto for test runs. It also emits the form to add new "synthetic" test runs
        and delete existing ones.

        * public/admin/tests.php: We wrongfully assumed there is exactly one test configuration for each metric
        on each platform; there could be configurations of distinct types such as "current" and "baseline".
        Thus, update all test configurations for a given metric when updating config_is_in_dashboard.

        * public/api/runs.php: Remove the NotImplemented when we have multiple test configurations.
        (fetch_runs_for_config): "Synthetic" test runs created on test-configurations page are missing revision
        data so we need to left-outer-join (instead of inner-join) build_revisions. To avoid making the query
        unreadable, don't join revision_repository here. Instead, fetch the list of repositories upfront and
        resolve names in parse_revisions_array. This actually reduces the query time by ~10%.

        (parse_revisions_array): Skip an empty array created for "synthetic" test runs.

        * public/include/admin-header.php:
        (AdministrativePage::render_table): Now custom columns support sub columns. e.g. a configuration column may
        have id and type sub columns, and each custom column could generate multiple rows.

        Any table with sub columns now generates two rows for thead. We generate td's in in the first row without
        sub columns with rowspan of 2, and generate ones with sub columns with colspan set to the sub column count.
        We then proceed to generate the second header row with sub column names.

        When generating the actual content, we first generate all custom columns as they may have multiple rows in
        which case regular columns need rowspan set to the maximum number of rows.

        Once we've generated the first row, we proceed to generate subsequent rows for those custom columns that
        have multiple rows.

        (AdministrativePage::render_custom_cells): Added. This function is responsible for generating table cells
        for a given row in a given custom column. It generates an empty td when the custom column doesn't have
        enough rows. It also generates empty an td when it doesn't have enough columns in some rows except when
        the entire row consists of exactly one cell for a custom column with sub columns, in which case the cell is
        expanded to occupy all sub columns.

        * public/include/manifest.php:
        (ManifestGenerator::platforms): Don't add the metric more than once.

        * public/include/test-name-resolver.php:
        (TestNameResolver::__construct): We had wrongfully assumed that we have exactly one test configuration on
        each platform for each metric like tests.php. Fixed that. Also fetch the list of aggregators to compute the
        full metric name later.
        (TestNameResolver::map_metrics_to_tests): Populate $this->id_to_metric.
        (TestNameResolver::test_id_for_full_name): Simplified the code using array_get.
        (TestNameResolver::full_name_for_test): Added.
        (TestNameResolver::full_name_for_metric): Added.
        (TestNameResolver::configurations_for_metric_and_platform): Renamed as it returns multiple configurations.

        * public/js/helper-classes.js:
        (TestBuild): Use the build time as the maximum time when revision information is missing for "synthetic"
        test runs created to set baseline and target points.

2014-01-24  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix after r57928. Removed a superfluous close parenthesis.

        * public/api/runs.php:

2014-01-24  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed build & typo fixes.

        * public/admin/platforms.php:
        * tests/admin-platforms.js:

2014-01-24  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/15704893> perf dashboard should show baseline numbers

        Rubber-stamped by Antti Koivisto.

        Organize some code into functions in runs.php.

        Also added back $paths that was erroneously removed in r57925 from json-header.php.

        * public/api/runs.php:
        (fetch_runs_for_config): Extracted.
        (format_run): Ditto.

2014-01-23  Ryosuke Niwa  <rniwa@webkit.org>

        Merge the upstream json-shared.php as of https://trac.webkit.org/r162693.

        * database/config.json:
        * public/admin/reprocess-report.php:
        * public/api/report.php:
        * public/api/runs.php:
        * public/include/json-header.php:

2014-01-23  Ryosuke Niwa  <rniwa@webkit.org>

        Commit yet another forgotten change.

        Something went horribly wrong with my merge :(

        * database/init-database.sql:

2014-01-23  Ryosuke Niwa  <rniwa@webkit.org>

        Commit one more forgotten change. Sorry for making a mess here.

2014-01-23  Ryosuke Niwa  <rniwa@webkit.org>

        Commit the forgotten files.

        * public/admin/platforms.php: Added.
        * tests/admin-platforms.js: Added.

2014-01-23  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/15889905> SafariPerfMonitor: there should be a way to merge and hide platforms

        Reviewed by Stephanie Lewis.

        Added /admin/platforms/ page to hide and merge platforms.

        Merging two platforms is tricky because we need to migrate test runs as well as some test configurations.
        Recall that each test (e.g. Dromaeo) can have many "test metrics" (e.g. MaxAllocations, EndAllocations),
        and they have a distinct "test configuration" for each platform (e.g. MaxAllocation on Mountain Lion), and
        each test configuration a distinct "test run" for each build.

        In order to merge platform A into platform B, we must migrate all test runs that belong to platform A via
        their test configurations into platform B.

        Suppose we're migrating a test run R for test configuration T_A in platform A for metric M. Since M exists
        independent of platforms, R should continue to relate to M through some test configuration. Unfortunately,
        we can't simply move T_A into platform B since we may already have a test configuration T_B for metric M
        in platform B, in which case R should relate to T_B instead.

        Thus, we first migrate all test runs for which we already have corresponding test configurations in the
        new platform. We then migrate the test configurations of the remaining test runs.

        * database/init-database.sql: Added platform_hidden.

        * public/admin/platforms.php: Added.
        (merge_platforms): Added. Implements the algorithm described above.
        (merge_list): Added.

        * public/admin/tests.php: Disable the checkbox to show a test configuration on the dashboard if its platform
        is hidden since it doesn't do anything.

        * public/include/admin-header.php: Added the hyperlink to /admin/platforms.
        (update_field): Don't bail out if the newly added "update-column" is set to the field name even if $_POST is
        missing it since unchecked checkbox doesn't set the value in $_POST.
        (AdministrativePage::render_form_control_for_column): Added the support for boolean edit mode. Also used
        switch statement instead of repeated if's.
        (AdministrativePage::render_table): Emit "update-column" for update_field.

        * public/include/db.php: Disable warnings when we're not in the debug mode.

        * public/include/manifest.php:
        (ManifestGenerator::platforms): Skip platforms that have been hidden.

        * run-tests.js:
        (TestEnvironment.postJSON):
        (TestEnvironment.httpGet):
        (TestEnvironment.httpPost): Added.
        (sendHttpRequest): Set the content type if specified.

        * tests/admin-platforms.js: Added tests.

2014-01-22  Ryosuke Niwa  <rniwa@webkit.org>

        Extract the code to compute full test names from tests.php.

        Reviewed by Stephanie Lewis.

        Extracted TestNameResolver out of tests.php. This reduces the number of global variables in tests.php
        and paves our way to re-use the code in other pages.

        * public/admin/tests.php:

        * public/include/db.php:
        (array_set_default): Renamed from array_item_set_default and moved from tests.php as it's used in both
        tests.php and test-name-resolver.php.

        * public/include/test-name-resolver.php: Added.
        (TestNameResolver::__construct):
        (TestNameResolver::compute_full_name): Moved from tests.php.
        (TestNameResolver::map_metrics_to_tests): Ditto.
        (TestNameResolver::sort_tests_by_full_name): Ditto.
        (TestNameResolver::tests): Added.
        (TestNameResolver::test_id_for_full_name): Ditto.
        (TestNameResolver::metrics_for_test_id): Ditto.
        (TestNameResolver::child_metrics_for_test_id): Ditto.
        (TestNameResolver::configuration_for_metric_and_platform): Ditto.

2014-01-21  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/15867325> Perf dashboard is erroneously associating reported results with old revisions

        Reviewed by Stephanie Lewis.

        Add the ability to reprocess reports so that I can re-associate wrongfully associated reports.

        Added public/admin/reprocess-report.php. It doesn't have any nice UI to find reports and it returns JSON
        but that's sufficient to correct the wrongfully processed reports for now.

        * public/admin/reprocess-report.php: Added. Takes a report id in $_GET or $_POST and process the report.
        We should eventually add a nice UI to find and reprocess reports.

        * public/api/report.php: ReportProcessor and TestRunsGenerator have been removed.

        * public/include/db.php: Added the forgotten call to prefixed_column_names.

        * public/include/report-processor.php: Copied from public/api/report.php.
        (ReportProcessor::__construct): Fetch the list of aggregators here for simplicity.
        (ReportProcessor::process): Optionally takes $existing_report_id. When this value is specified, we don't
        create a new report or authenticate the builder password (the password is never stored in the report).
        Also use select_first_row instead of query_and_fetch_all to find the builder for simplicity.
        (ReportProcessor::construct_build_data): Extracted from store_report_and_get_build_data.
        (ReportProcessor::store_report): Ditto.

        * tests/admin-reprocess-report.js: Added.

2014-01-21  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/15867325> Perf dashboard is erroneously associating reported results with old revisions

        Reviewed by Ricky Mondello.

        The bug was caused by a build fix r57645. It attempted to treat multiple reports from the same builder
        for the same build number as a single build by ignoring build time. This was necessary to associate
        multiple reports by a single build - e.g. for different performance test suites - because the scripts
        we use to submit results computed its own "build time" when they're called.

        An unintended consequence of this change was revealed when we moved a buildbot master to the new machine
        last week; new reports were wrongfully associated with old build numbers.

        Fixed the bug by not allowing reports made more than 1 day after the initial build time to be assigned
        to the same build. Instead, we create a new build object for those reports. Since the longest set of
        tests we have only take a couple of hours to run, 24 hours should be more than enough.

        * database/init-database.sql: We can no longer constrain that each build number is unique to a builder
        or that build number and build time pair is unique. Instead, constrain the uniqueness of the tuple
        (builder, build number, build time).

        * public/api/report.php:
        (ReportProcessor::resolve_build_id): Look for any builds made within the past one day. Create a new build
        when no such build exists. This prevents a report from being associated with a very old build of the same
        build number.

        Also check that revision numbers or hashes match when we're adding revision info. This will let us catch
        a similar bug in the future sooner.

        * tests/api-report.js: Added three test cases.

2014-01-20  Ryosuke Niwa  <rniwa@webkit.org>

        Merged the upstream changes to db.php
        See http://trac.webkit.org/browser/trunk/Websites/test-results/public/include/db.php

        * public/include/db.php:

2014-01-20  Ryosuke Niwa  <rniwa@webkit.org>

        Update other scripts and tests per previous patch.

        * public/include/manifest.php:
        * tests/admin-regenerate-manifest.js:

2014-01-20  Ryosuke Niwa  <rniwa@webkit.org>

        Remove metrics_unit.

        Reviewed by Ricky Mondello.

        This column is no longer used by the front-end code since r48360.

        * database/init-database.sql:
        * public/admin/tests.php:

2014-01-16  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed build fix.

        * public/api/report.php:

2014-01-15  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/15832456> Automate DoYouEvenBench (124497)

        Reviewed by Ricky Mondello.

        Support a new alternative format for aggregated results where we have raw values as well as
        the list aggregators so that instead of
        "metrics": {"Time": ["Arithmetic"]}
        we can have
        "metrics": {"Time": { "aggregators" : ["Arithmetic"], "current": [300, 310, 320, 330] }}

        This allows single JSON generated by run-perf-tests in WebKit to be shared between the perf
        dashboard and the generated results page, which doesn't know how to aggregate values.

        We need to keep the support for the old format because all other existing performance tests
        all rely on the old format. Even if we updated the tests, we need the dashboard to support
        the old format during the transition.

        * public/api/report.php:
        (ReportProcessor::recursively_ensure_tests): Support the new format in addition to the old one.
        (ReportProcessor::aggregator_list_if_exists): Replaced is_list_of_aggregators.

        * tests/api-report.js: Updated one of aggregator test cases to test the new format.

2013-05-31  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed; Tweak the CSS so that chart panes align vertically.

        * public/index.html:

2013-05-31  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor should support Combined metric.

        * public/js/helper-classes.js:
        (PerfTestRuns): Added 'Combined' metric. In general, it could be used for smaller-is-better
        value as well but assume it to be greater-is-better for now.

2013-05-30  Ryosuke Niwa  <rniwa@webkit.org>

        Commit the forgotten init-database change to add iteration_relative_time.

        * database/init-database.sql:

2013-05-30  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13993069> SafariPerfMonitor: Support accepting (relative time, value) pairs

        Reviewed by Ricky Mondello.

        Add the support for each value to have a relative time. This is necessary for frame rate history
        since a frame rate needs to be associated with a time it was sampled.

        * database/init-database.sql: Added iteration_relative_time to run_iterations.

        * public/api/report.php:
        (TestRunsGenerator::test_value_list_to_values_by_iterations): Reject any non-numeral values here.
        This code is used to aggregate values but it doesn't make sense to aggregate iteration values
        with relative time since taking the average of two frame rates for two subtests taken at two
        different times doesn't make any sense.
        (TestRunsGenerator::compute_caches): When we encounter an array value while computing sum, mean,
        etc..., use the second element since we assume values are of the form (relative time, frame rate).
        Also exit early with an error if the number of elements in the array is not a pair.
        (TestRunsGenerator::commit): Store the relative time and the frame rate as needed.

        * tests/api-report.js: Added a test case. Also modified existing test cases to account for
        iteration_relative_time.

2013-05-27  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13654488> SafariPerfMonitor: Support accepting single-value results

        Reviewed by Ricky Mondello.

        Support that. It's one line change.

        * public/api/report.php:
        (ReportProcessor.recursively_ensure_tests): When there is exactly one value, wrap it inside an array
        to match the convention assumed elsewhere.
        * tests/api-report.js: Added a test case.

2013-05-26  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor shows popups for points outside of the visible region.

        Rubber-stamped by Simon Fraser.

        * public/index.html:
        (Chart.closestItemForPageXRespectingPlotOffset): renamed from closestItemForPageX.
        (Chart.attach): Always use closestItemForPageXRespectingPlotOffset to work around the fact flot
        may return an item underneath y-axis labels.

2013-05-26  Ryosuke Niwa  <rniwa@webkit.org>

        Tweak the CSS a little to avoid the test name overlapping with the summary table.

        * public/index.html:

2013-05-26  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed. Fix the typo. The anchor element should wrap the svg element, not the other way around.

        * public/index.html:

2013-05-26  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13992266> Should be a toggle to show entire Y-axis range
        <rdar://problem/13992271> Should scale Y axis to include error ranges

        Reviewed by Ricky Mondello.

        Add the feature. Also made adjust y-axis respect confidence interval delta so that the gray shade behind
        the main graph doesn't go outside the graph even when the y-axis is adjusted.

        * database/config.json:
        * public/index.html:
        (Chart): Add a SVG arrow to toggle y-axis mode, and bind click on the arrow to toggleYAxis().
        (Chart.attachMainPlot): Respect shouldStartYAxisAtZero.
        (Chart.toggleYAxis): Toggle the y-axis mode of this chart by toggling shouldStartYAxisAtZero and calling
        attachMainPlot.
        * public/js/helper-classes.js:
        (PerfTestResult.confidenceIntervalDelta):
        (PerfTestResult.unscaledConfidenceIntervalDelta): Extracted.
        (PerfTestRuns.min): Take confidence interval delta into account.
        (PerfTestRuns.max): Ditto.
        (PerfTestRuns.hasConfidenceInterval): Not sure why this function was checking the typeof. Just use isNaN.

2013-04-26  Ryosuke Niwa  <rniwa@webkit.org>

        A build fix of the previous. Don't look for a test with NULL parent because NULL != NULL in our beloved SQL.

        * public/api/report.php:
        (ReportProcessor::recursively_ensure_tests):
        * tests/api-report.js: Added a test.

2013-04-26  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed build fixes.

        * public/api/report.php:
        (ReportProcessor::process): Explicitly exit with error when builder name or build time is missing.
        Also, tolerate reports without any revision information.

        (ReportProcessor::recursively_ensure_tests): When looking for a test, don't forget to compare its
        parent test.

        * tests/api-report.js: Added few test cases.

2013-04-26  Ryosuke Niwa  <rniwa@webkit.org>

        Commit another change that was supposed to be committed in r50331.

        * run-tests.js:
        (TestEnvironment.this.postJSON):
        (TestEnvironment.this.httpGet):
        (sendHttpRequest):

2013-04-09  Ryosuke Niwa  <rniwa@webkit.org>

        Commit the remaining files.

        * public/admin/regenerate-manifest.php:
        * public/include/admin-header.php:
        * public/include/json-header.php:
        * public/include/manifest.php:
        * run-tests.js:
        (TestEnvironment.this.postJSON):
        (TestEnvironment.this.httpGet):
        (sendHttpRequest):

2013-03-15  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Add some tests for admin/regenerate-manifest.

        Reviewed by Ricky Mondello.

        Added some tests for admin/regenerate-manifest.

        * public/admin/regenerate-manifest.php: Use require_once instead of require.
        * public/include/admin-header.php: Ditto.
        * public/include/json-header.php: Ditto.

        * public/include/manifest.php:
        (ManifestGenerator::builders): Removed a reference to a non-existent variable.
        When there are no builders, simply return an empty array.

        * run-tests.js:
        (TestEnvironment.postJSON):
        (TestEnvironment.httpGet): Added.
        (sendHttpRequest): Renamed from postHttpRequest as it now takes method as an argument.

        * tests/admin-regenerate-manifest.js: Added with a bunch of test cases.

2013-03-14  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed. Added more tests for api/report to ensure it creates tests, metrics, test_runs,
        and run_iterations. Also fixed a typo in report.php found by new tests.

        * public/api/report.php:
        (main): Fix a bug in the regular expression to wrap numbers with double quotations.
        * tests/api-report.js: Added more test cases.

2013-03-12  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13399038> SafariPerfMonitor: Need integration tests

        Reviewed by Ricky Mondello.

        Add a test runner script and some simple test cases.

        * database/config.json: Added the configuration for "testServer".
        * database/database-common.js:
        (pathToTests): Added.
        * run-tests.js: Added.
        (main):

        (confirmUserWantsDatabaseToBeInitializedIfNeeded): Checks whether there are any non-empty tables,
        and if there are, asks the user if it’s okay to delete all of the data contained therein.
        (confirmUserWantsDatabaseToBeInitializedIfNeeded.findNonEmptyTable): Find a table with non-zero
        number of rows.
        (confirmUserWantsDatabaseToBeInitializedIfNeeded.fetchTableNames): Fetch the list of all tables
        in the current database using PostgreSQL's information_schema.
        (askYesOrNoQuestion):

        (initializeDatabase): Executes init-database.sql. It drops all tables and creates them again.

        (TestEnvironment): The global object exposed in tests. Provides various utility functions.
        (TestEnvironment.assert): Exposes assert to tests.
        (TestEnvironment.console): Exposes console to tests.
        (TestEnvironment.describe): Adds a description.
        (TestEnvironment.it): Adds a test case.
        (TestEnvironment.postJSON):
        (TestEnvironment.queryAndFetchAll):
        (TestEnvironment.sha256):
        (TestEnvironment.notifyDone): Ends the current test case.

        (postHttpRequest):

        (TestContext): An object created for each test case. Conceptually, this object is always on
        "stack" when a test case is running. TestEnvironment and an uncaughtException handler accesses
        this object via currentTestContext.
        (TestContext.description):
        (TestContext.done):
        (TestContext.logError):

        * tests: Added.
        * tests/api-report.js: Added some basic tests for /api/report.php.

2013-03-08  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed administrative page fix. Make it possible to remove all configuration from dashboard.

        The problem was that we were detecting whether we're updating dashboard or not by checking
        the existence of metric_configurations in $_POST but this key doesn't exist when we're removing
        all configurations. Use separate 'dashboard' action to execute the code even when
        metric_configurations is empty.

        * public/admin/tests.php:

2013-03-08  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Extract a class to aggregate and store values from ReportProcessor.

        Reviewed by Ricky Mondello.

        This patch extracts TestRunsGenerator, which aggregates and compute caches of values,
        from ReportProcessor as a preparation to replace deprecated aggregate.js.

        * public/api/report.php:
        (ReportProcessor::exit_with_error): Moved.
        (ReportProcessor::process): Use the extracted TestRunsGenerator.
        (TestRunsGenerator): Added.
        (TestRunsGenerator::exit_with_error): Copied from ReportProcessor.
        (TestRunsGenerator::add_aggregated_metric): Moved.
        (TestRunsGenerator::add_values_for_aggregation): Moved. Made public.
        (TestRunsGenerator::aggregate): Moved. Made public.
        (TestRunsGenerator::aggregate_current_test_level): Moved.
        (TestRunsGenerator::test_value_list_to_values_by_iterations): Moved.
        (TestRunsGenerator::evaluate_expressions_by_node): Moved.
        (TestRunsGenerator::compute_caches): Moved. Made public.
        (TestRunsGenerator::add_values_to_commit): Moved. Made public.
        (TestRunsGenerator::commit): Moved. Made public. Also takes build_id and platform_id.
        (TestRunsGenerator::rollback_with_error): Moved.

2013-03-08  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Administrative pages should update manifest JSON as needed.

        Reviewed by Remy Demarest.

        Regenerate the manifest file when updating fields or adding new items that are included in
        the manifest JSON.

        * public/admin/bug-trackers.php:
        * public/admin/builders.php:
        * public/admin/regenerate-manifest.php:
        * public/admin/repositories.php:
        * public/admin/tests.php:
        * public/include/admin-header.php:
        (regenerate_manifest): Extracted from regenerate-manifest.php.

2013-03-08  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed build fix for memory test results.

        Make aggregation work in the nested cases. We start from the "leaf" tests and move our ways up,
        aggregating at each level.

        * public/api/report.php:
        (ReportProcessor::recursively_ensure_tests):
        (ReportProcessor::add_aggregated_metric): Renamed from ensure_aggregated_metric.
        (ReportProcessor::add_values_for_aggregation):
        (ReportProcessor::aggregate):
        (ReportProcessor::aggregate_current_test_level): Extracted from aggregate.

2013-03-02  Ryosuke Niwa  <rniwa@webkit.org>

        Build fixes. iteration_count_cache should be the total number of values in all iteration group,
        not the number of iteration groups. Also, don't set group number when the entire run belongs
        a single iteration group.

        * public/api/report.php:
        (ReportProcessor::commit):

2013-03-01  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Introduce iteration groups

        Reviewed by Remy Demarest.

        In WebKit land, we're going to use multiple instances of DumpRenderTree or WebKitTestRunner to amortize
        the runtime environment variances to get more stable results. And it's desirable to keep track of
        the instance of DumpRenderTree or WebKitTestRunner used to generate each iteration value.

        This patch introduces "iteration groups" to keep track of this extra information.

        Instead of receiving a flat array of iteration values, we can now receive a two dimensional array where
        the outer array denotes iteration groups and each inner array contains iteration values for each group.


        * database/init-database.sql: Add iteration_group column.
        * public/api/report.php:
        (ReportProcessor::recursively_ensure_tests): Always use the two dimensional array internally.

        (ReportProcessor::aggregate): test_value_list_to_values_by_iterations now returns an associative array
        contains the list of values indexed by the iteration order and group sizes. Store the group size so
        that we can restore the iteration groups before passing it to node.js and restore them later.

        (ReportProcessor::test_value_list_to_values_by_iterations): Flatten iteration groups into an array
        of values and construct group_size array to restore the groups later in ReportProcessor::aggregate.

        Also check that each iteration group in each subtest are consistent with one another. To see why we need
        to do this, suppose we're aggregating two tests T1 and T2 with the following values. Then it's important
        that each iteration group in T1 and T2 have the same size:
        T1 = [[1, 2], [3, 4, 5]]
        T2 = [[6, 7], [8, 9, 10]]

        so that the aggregated result (the sum in this case) can have the same groups as in:
        T  = [[7, 9], [11, 13, 15]]

        If some iteration groups in T1 and T2 had a different size as in:
        T1 = [[1, 2, 3], [4, 5]]
        T2 = [[6, 7], [8, 9, 10]]

        Then iteration groups of the aggregated T is ambiguous.

        (ReportProcessor::compute_caches): Flatten iteration groups to compute caches (e.g. mean, stdev, etc...)
        (ReportProcessor::commit): Store iteration_group values.

2013-03-01  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed. Delete the migration tool for webkit-perf.appspot.com now that we have successfully
        migrated to perf.webkit.org.

        * database/perf-webkit-migrator.js: Removed.

2013-03-01  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Don't forget to add metrics of the top level tests e.g. Dromaeo:Time:Arithmetic.

        * public/index.html:
        (.showCharts):

2013-03-01  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Make it possible to add charts for all subtests or all platforms.

        Reviewed by Ricky Mondello.

        It is often desirable to see charts of a given test for all platforms, or to be able to see
        charts of all subtests on a given platform when trying to triage perf. regressions.

        Support this use case by adding the ability to do so on the charts page.

        Also, we used to disable items on the test list based on the platform chosen. This turned out
        to be a bad UI because in many situations you want to be able to compare results of the same test
        on multiple platforms.

        In this new UI, we have three select elements, each of which selects the following:
        1. Top-level test - Test suite such as Dromaeo
        2. Metric - Pages and subtests under the suite such as www.webkit.org for dom-modify:Runs
           (where dom-modify is the name of the subtest and Runs is a metric in that subtest) for Dromaeo.
        3. Platform - Mountain Lion, Qt, etc...

        A user can select "all" for metric and platform but we disallow doing both at once since adding
        all metrics on all platforms tends to add way too many charts and hang the browser. I also can't
        think of a use case where you want to look at that many charts at once. We can support this later
        if valid use cases come up.

        * public/index.html:
        (.showCharts.addOption): Extracted.
        (.showCharts): Added "metricList" that shows the list of test and metrics (in the form of
        relative metrics paths such as "DOMWalk:Time") for each top-level test selected in testList.
        metricList has onchange handler that enables/disables items on platformList.
        
        (init): Sort tests and test metrics here instead of doing that in showCharts.

2013-02-28  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13316756> SafariPerfMonitor: tooltip should include a link to build URLs

        Reviewed by Remy Demarest and Ricky Mondello.

        Added a hyperlink to build page in tooltips. Repeating the entire build URL in each build
        was a bad idea because it bloats the resultant JSON file too much. So move the build URL
        templates to the manifest file instead. Each build now only contains the builder id.

        * public/api/runs.php: Removed the part of the query that joined builders table. This
        speeds up the query quite a bit.

        * public/include/manifest.php:
        (ManifestGenerator::generate): Generate builders field.
        (ManifestGenerator::builders): Added. Returns an associative array of builder ids to an
        associative array that contains name and its build URL template.

        * public/index.html:
        (.buildLabelWithLinks.linkifyIfNotNull): Renamed from linkifiedLabel. Take a label and url
        instead of a revision since this function is used for revisions and build page URLs now.
        (.buildLabelWithLinks): Include the linkified build number.

        * public/js/helper-classes.js:
        (TestBuild.builder): Added.
        (TestBuild.buildNumber): Added.
        (TestBuild.buildUrl): Returns the build URL. The variable name in the URL template has been
        changed from %s to $buildNumber to be more descriptive and consistent with other URL templates.

2013-02-27  Ryosuke Niwa  <rniwa@webkit.org>

        Tooltips interfere with user interactions

        Rubber-stamped by Simon Fraser.

        Disable tooltip on the dashboard page since graphs are too small to be useful there.
        Also, show graphs for only 10 days by default as opposed to 20.
        Finally, dismiss the hovering tooltip when mouse enters a "pinned" tooltip.

        * public/index.html:
        * public/js/helper-classes.js:

2013-02-24  Ryosuke Niwa  <rniwa@webkit.org>

        Fix some serious typo. We're supposed to be using SHA-256, not SHA-1 to hash our passwords,
        to be compatible with webkit-perf.appspot.com.

        * public/admin/builders.php:
        * public/api/report.php:

2013-02-23  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed.

        Add a missing constraint on builds table. For a given builder, there should be exactly
        one build for a given build number.

        Also add report_committed_at to reports table to record the time at which a given report
        was processed and test_runs and run_iterations rows were committed into the database.

        * database/config.json:
        * public/api/report.php:

2013-02-22  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed. Add more checks for empty SQL query results.

        * public/include/manifest.php:

2013-02-21  Ryosuke Niwa  <rniwa@webkit.org>

        More build fixes on perf.webkit.org.

        * public/api/runs.php: Make PostgreSQL happier.
        * public/include/manifest.php: Don't assume we always have bug trackers.

2013-02-21  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: index.html duplicates the code in PerfTestRuns to determine smallerIsBetter
        and fix other miscellaneous UI bugs.

        Rubber-stamped by Simon Fraser.

        Removed the code to determine whether smaller value is better or not for a given test in index.html
        in the favor of using that of PerfTestRuns.

        * public/include/manifest.php: Fixed a typo.
        * public/index.html:
        (Chart):
        (Chart.attachMainPlot): Fixed a bug to access previousPoint.left even when previousPoint is null.

        * public/js/helper-classes.js:
        (PerfTestRuns): Added EndAllocations, MaxAllocations, and MeanAllocations.

        (PerfTestRuns.computeScalingFactorIfNeeded): When the mean is almost 10,000 units, we may end up
        using 5 digits instead of 4, resulting in the use of scientific notations. Go up to the next unit
        at roughly 2,000 units to avoid this.

        (Tooltip.show): Show the tooltip even when the new content is identical to the previous content.
        The only thing we can avoid is innerHTML.

2013-02-21  Ryosuke Niwa  <rniwa@webkit.org>

        Another build fix. The path to node is /usr/local/bin/node, not /usr/bin/local/node

        * public/include/evaluator.js:

2013-02-21  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13267898> SafariPerfMonitor: Bug trackers should be configurable

        Reviewed by Remy Demarest.

        Made the list of bug trackers configurable. Namely, each bug tracker can be added in
        admin/bug-trackers.php and can be associated with multiple repositories.

        The association between bug trackers and repositories (such as WebKit, Safari, etc...) are used
        to determine the set of bug trackers to show for a given set of blame lists.
        e.g. if a test regressed due to a change in Safari, then we don't want to show WebKit Bugzilla as
        a place to file bugs against the regression.
F
        * database/init-database.sql: Added bug_trackers and tracker_repositories.
        Also drop those tables before creating them (note "DROP TABLE reports" was missing).

        * public/admin/bug-trackers.php: Added. The administrative interface for adding and managing
        bug trackers, namely associated repositories.

        * public/include/admin-header.php: Added a link to bug-trackers.php
        * public/include/manifest.php:
        (ManifestGenerator::generate): Include the list of bug trackers in the manifest.
        Also moved the code to fetch repositories table here from ManifestGenerator::repositories.

        (ManifestGenerator::repositories):

        (ManifestGenerator::bug_trackers): Added. Generates an associative array of bug trackers where
        keys are names of bug trackers and values are associative arrays with keys 'new_bug_url' and
        'repositories' where the latter contains the list of associated repository names.

        * public/index.html:
        (Chart): Takes bugTrackers as as argument.
        (Chart.showTooltipWithResults): Removed the hard-coded list.
        (init):
        (init.addPlatformsToDashboard):
        (init.showCharts.createChartFromListPair):
        (init): Stores the list of bug trackers in the manifest to a local variable.

2013-02-21  Ryosuke Niwa  <rniwa@webkit.org>

        A follow up on the previous build fix. When using proc_open, we need to make evalulator.js executable.

        * public/include/evaluator.js:

2013-02-21  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Extract the code to generate tabular view in administrative pages

        Reviewed by Remy Demarest.

        Extracted AdministrativePage to share the code to generate a tabular view of data and a form to insert
        new row into the database.

        * public/admin/aggregators.php: Use AdministrativePage.
        * public/admin/builders.php: Ditto.
        * public/admin/repositories.php: Ditto.
        * public/include/admin-header.php:
        (AdministrativePage): Added.
        (AdministrativePage::__construct): column_info is an associative array that maps a SQL column name
        to an associative array that describes the column.
            - editing_mode: Specifies the type of form ('text', 'url', or 'string') to show for this column.
            - label: Human readable name of the column.
            - pre_insertion: Signifies that this column exists only before the row is inserted. e.g. password
              column exists only before we create password_hash column at the insertion time.

        (AdministrativePage::name_to_titlecase): Converts an underscored lowercase name to a human readable
        titlecase (e.g. new_bug is converted to New Bug).
        (AdministrativePage::column_label): Obtains the label specified in column_info or titlecased column name.
        (AdministrativePage::render_form_control_for_column): "Renders" a text form control such as input and
        textarea for a given editing mode ('text', 'url', or 'string').
        (AdministrativePage::render_table): Renders a whole SQL table after sorting rows by the specified column.
        (AdministrativePage::render_form_to_add): Renders a form to insert new row.

2013-02-20  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Some systems don't support r+. Use proc_open instead.

        * public/api/report.php:

2013-02-15  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Use the mean data series as supposed to upper or lower confidence bounds
        when computing the y-axis of data points to show tooltips at.

        * public/index.html:

2013-02-15  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed. Removed .htaccess in favor of directly putting directives in httpd.conf.

        * Install.md:
        * public/.htaccess: Removed.

2013-02-14  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed.

        * public/include/manifest.php: Build fix. db is on this.
        * public/js/statistics.js:
        (Statistics.confidenceInterval): Added. An utility function for debugging purposes.

2013-02-13  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13165667> SafariPerfMonitor doesn't work on perf.webkit.org (Part 2)

        Reviewed by Anders Carlsson.

        Rewrote and merged populate-from-report.js into report.php.

        * database/config.json: Added a path to node.js.

        * database/init-database.sql: Don't require unit to be always present since it's no longer used by the front end.
        Once we land this patch and update the administrative pages, we can remove this column.

        Also add a new reports table to store JSON reported by builders. We used to store everything in jobs table but
        that table is going away once we remove the node.js backend.

        * database/populate-from-report.js: Removed.
        * public/api/report.php: Added.
        (ReportProcessor):
        (ReportProcessor.__construct):
        (ReportProcessor.process):

        (ReportProcessor.store_report_and_get_build_data): We store the report into the database as soon as it has been
        verified to be submitted by a known builder.

        (ReportProcessor.exit_with_error): Store the error message and details in the database if the report had been
        stored. If not, then notify that to the client via 'failureStored' in the JSON response.
        (ReportProcessor.resolve_build_id): Insert build and build_revisions rows if needed. We don't do this atomically
        inside a transaction because there could be multiple reports for a single build, each containing results for
        different tests.

        (ReportProcessor.recursively_ensure_tests): Parse a tree of tests and insert tests and test_metrics rows as
        needed. It also computes the metrics to aggregate and prepares values to commit via ensure_aggregated_metric,
        add_values_to_commit, and add_values_for_aggregation.

        (ReportProcessor.is_list_of_aggregators): When a metric is an aggregation, it contains an array of aggregator
        names, e.g. ["Arithmetic", "Geometric"], instead of a dictionary of configuration types to their values,
        e.g. {Time: {current: [1, 2, 3,]}}. This function detects the former. (Note that dictionary and list are both
        array's in PHP).

        (ReportProcessor.ensure_aggregated_metric): Create a metric with aggregator to add it to the list of metrics
        to be aggregated in ReportProcessor.aggregate.

        (ReportProcessor.add_values_for_aggregation): Called by test metrics with aggregated parent test metrics.

        (ReportProcessor.aggregate): Compute results for aggregated metrics. Consider a matrix with rows representing
        child tests and columns representing "iterations" for a given aggregated metrics M. Initially, we have values
        given for each row (child metrics of M). This function extracts each column (iteration) via
        test_value_list_to_values_by_iterations, and feeds it into evaluate_expressions_by_node to get aggregated values
        for each column (iteration of M). Finally, it registers those aggregated values to be committed.

        Note that we don't want to start a new node.js process for each aggregation, so we accumulate all values to be
        aggregated in node.js in $expressions. Each entry in $expressions is a JSON string that contains code and
        values to be aggregated. node.js gives us back a list of JSON strings that contain aggregated values.

        (ReportProcessor.test_value_list_to_values_by_iterations): See above.
        (ReportProcessor.evaluate_expressions_by_node): See above.

        (ReportProcessor.compute_caches): Compute cached mean, sum, and square sums for each run we're about to add
        using evaluate_expressions_by_node. We can't do this before computing aggregated results since those aggregated
        results also need the said caches.

        (ReportProcessor.add_values_to_commit):

        (ReportProcessor.commit): Add test_runs and run_iterations atomically inside a transaction, rolling back
        the transaction as needed if anything goes wrong.

        (ReportProcessor.rollback_with_error)
        (main):
        * public/include/db.php:
        (Database.prepare_params): Use $values (instead of $placeholders) to compute the current index since
        placeholders ($1, $2, etc...) may be split up into multiple arrays given they may not necessarily show up
        contiguously in a SQL statement.

        (Database.select_or_insert_row): Added. Selects a row if the attempt to insert the same row fails. It
        automatically creates a query string from a dictionary of unprefixed column names and table. It returns
        a column value of the choice.

        (Database.begin_transaction): Added.
        (Database.commit_transaction): Added.
        (Database.rollback_transaction): Added.

        * public/include/evaluator.js: Added.
        * public/include/json-header.php:
        (exit_with_error): Take error details and merge it with "additional details". This allows report.php to provide
        context under which the request failed.
        (successful_exit): Merge "additional details".
        (set_exit_detail): Added. Sets "additional details" to the JSON returned by exit_with_error or successful_exit.
        (merge_additional_details):

2013-02-12  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Add more helper functions to db.php

        Reviewed by Remy Demarest.

        Added Database::insert_row and array_get to make common database operations easier.

        * public/admin/aggregators.php: Use Database::insert_row instead of
        execute_query_and_expect_one_row_to_be_affected.

        * public/admin/builders.php: Ditto.

        * public/admin/tests.php: Ditto; We used to run a separate SELECT query just to get the id after
        inserting a row. With insert_row, we don't need that.

        * public/include/admin-header.php: Ditto.

        * public/include/db.php:
        (array_get): Added. It returns the value of an array given a key if the key exists; otherwise
        return the default value (defaults to NULL) if the key doesn't exist.

        (Database::column_names): Added. Prefixes an array of column names and creates a comma separated
        list of the names.

        (Database::prepare_params): Added. Takes an associative array of column names and their values,
        and builds up arrays for placeholder (e.g. $1, $2, etc...) and values, then returns an array of
        column names all in the same order.

        (Database::insert_row): Added. Inserts a new row into the specified table where column names have
        the given prefix. Values are given in a form of an associative array where keys are unprefixed
        column names and values are corresponding values. When the row is successfully inserted, it returns
        the specified column's value (defaults to prefix_id). If NULL is specified, it returns a boolean
        indicating the success of the insertion.

2013-02-11  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13165667> SafariPerfMonitor doesn't work on perf.webkit.org (Part 1)

        Reviewed by Conrad Shultz.

        Rewrote the manifest generator in PHP.

        * database/generate-manifest.js: Removed.
        * public/admin/regenerate-manifest.php: Added. Use ManifestGenerator to generate and store the manifest.
        * public/include/db.php:
        (array_ensure_item_has_array): Added.
        * public/include/evaluator.js: Added.
        * public/include/json-header.php:
        * public/include/manifest.php: Added.

2013-02-11  Ryosuke Niwa  <rniwa@webkit.org>

        Dates on overflow plot are overlapping

        Rubber-stamped by Simon Fraser.

        Don't show more than 5 days.

        * public/index.html:
        * public/js/helper-classes.js:
        (TestBuild.UTCtoPST):
        (TestBuild.now):

2013-02-07  Ryosuke Niwa  <rniwa@webkit.org>

        Show build time as well as commit time on the dashboard and tooltips.

        Rubber-stamped by Simon Fraser.

        Include both the maximum commit time and build time in buildLabelWithLinks.
        Also use ISO format to save the screen real estate.

        * public/index.html:
        (buildLabelWithLinks):
        * public/js/helper-classes.js:
        (TestBuild):
        (TestBuild.buildTime):
        (TestBuild.formattedBuildTime):

2013-02-08  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed; Convert metric.name to metric.unit in the front end.

        * public/js/helper-classes.js:

2013-02-07  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13166276> SafariPerfMonitor: Need hyperlinks to file bugs

        Rubber-stamped by Simon Fraser.

        This patch adds hyperlinks to file new bugs on Radar and WebKit Bugzilla. Because we want to include information
        such as the degree of progression or regression and the regression ranges when filing new bugs, broke various
        label() functions into smaller pieces to be used in both generating tooltips and the hyperlinks.

        * public/index.html:
        (.buildLabelWithLinks): Extracted from TestBuild.label.
        (.showTooltipWithResults): Extracted from Tooltip.show. Also added the code to generate hyperlinks to file new bugs
        on Radar and WebKit Bugzilla.
        * public/js/helper-classes.js:
        (PerfTestResult.metric): Replaced test() as runs.test() no longer exists.
        (PerfTestResult.isBetterThan): Added.
        (PerfTestResult.formattedRelativeDifference): Extracted from PerfTestResult.label.
        (PerfTestResult.formattedProgressionOrRegression): Ditto. Also use "better" and "worse" instead of arrow symbols
        to indicate progressions or regressions.
        (PerfTestResult.label):
        (TestBuild.formattedTime): Added.
        (TestBuild.platform): Added.
        (TestBuild.formattedRevisions): Extracted from TestBuild.label. Merged a part of linkifyLabel.
        (TestBuild.smallerIsBetter): Added.
        (Tooltip.show): Take a raw markup instead of two results.

2013-02-06  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13151520> SafariPerfMonitor: Dashboard can cause excessive horizontal scrolling when there are many platforms

        Rubber-stamped by Tim Horton.

        Stack platforms when there are more than 3 of them since making the layout adaptive is tricky
        since each platform may have a different number of tests to be shown on the dashboard.

        * public/index.html:

2013-02-05  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Don't prefix a SVn revision with 'r' when constructing a changeset / blame URL.

        * public/js/helper-classes.js:
        (TestBuild.label):

2013-02-05  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: repository names or revisions are double-quoted when they contain a space

        Rubber-stamped by Tim Horton.

        The bug was in the PHP code that parsed Postgres array. Trim double quotations as needed.

        Also fixed a bug in TestBuild where we used to show the revision range as r1234-1250 when
        the revision r1234 was the revision used in the previous build.

        * public/api/runs.php:
        (parse_revisions_array): Trim double quotations around repository names and revisions.
        * public/js/helper-classes.js:
        (TestBuild.label):

2013-02-05  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13151558> SafariPerfMonitor: Tooltip is unusable

        Rubber-stamped by Tim Horton.

        * public/index.html:
        (Chart.attachMainPlot): Disable auto highlighting (circle around a data point that shows up on hover)
        on the dashboard page as it's way too noisy.

        (Chart.hideTooltip): Added. Hides the tooltip that shows up on hover.

        (.toggleClickTooltip): Extracted from the code for "mouseout" bind (now replaced by "mouseleave").
        Pins or unpins a tooltip. When pinning a tooltip, we create a tooltip behind the scene and show that
        so that the tooltip for hover can be reused further.

        (.closestItemForPageX): Find the closest item given pageX. We iterate data points from left to right,
        and find the first point that lies on the right of the cursor position. We then compute the midpoint
        between this and the previous point and pick the closer of the two. It returns an item-like object
        that has all properties we need since flot doesn't provide an API to retrieve the real item object.

        (Chart): Call toggleClickTooltip when a (hover) tooltip is clicked.

        (Chart.attach): In "plothover" bind, call closestItemForPageX when item is not provided by flot on
        the first or "current" data points (as opposed to target or baseline data points).

        Also bind the code to clear crosshair and hide tooltips to "mouseleave" instead of "mouseout", and
        avoid triggering this code when the cursor is still within the plot's rectangle (e.g. when a cursor
        moves onto a tooltip) to avoid the premature dismissal of a tooltip.

        * public/js/helper-classes.js:
        (Tooltip.ensureContainer): Don't automatically close then the user clicks on tooltip. Delegate this
        work to the client via bindClick.

        (Tooltip.show): Move tooltip up by 5px. Also added a FIXME to move this offset computation to the client.

        (Tooltip.bindClick): Added.

2013-02-03  Ryosuke Niwa  <rniwa@webkit.org>

        Yet another build fix. metricId*s*.

        * public/admin/tests.php:

2013-02-03  Ryosuke Niwa  <rniwa@webkit.org>

        Another build fix. Use the new payload format for the aggregate job.

        * public/admin/tests.php:

2013-02-03  Ryosuke Niwa  <rniwa@webkit.org>

        Build fixes.

        * database/aggregate.js: Use variables that actually exist.
        * database/database-common.js:
        (ensureConfigurationIdFromList): Add the newly added configuration to the list so that subsequent
        function calls will find this configuration.

2013-01-31  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13130139> SafariPerfMonitor: Add ReadMe

        Reviewed by Ricky Mondello.

        Turned InstallManual into a proper markdown document and added ReadMe.md.

        * InstallManual: Removed.
        * InstallManual.md: Moved from InstallManual.
        * ReadMe.md: Added.

2013-01-31  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13109335> SafariPerfMonitor: Add baseline and target lines

        Reviewed by Ricky Mondello.

        This patch prepares the front end code to process baseline and target results properly.

        * public/index.html:
        (fetchTest.createRunAndResults): Extracted.
        (fetchTest): Call createRunAndResults on current, baseline, and target values of the JSON.
        Deleted the comment about how sorting will be unnecessary once we start results in the server side
        since sorting by the maximum revision commit time turned out to be non-trivial in php.

2013-01-29  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13057071> SafariPerfMonitor: Use newer version of flot that supports timezone properly

        Reviewed by Tim Horton.

        Use flot at https://github.com/flot/flot/commit/ec168da2cb8619ebf59c7e721d12c44a7960ff41.
        These files are "dynamically linked" to our app.

        * public/index.html:
        * public/js/jquery-1.8.2.min.js: Removed.
        * public/js/jquery.colorhelpers.js: Added.
        * public/js/jquery.flot.categories.js: Added.
        * public/js/jquery.flot.crosshair.js: Added.
        * public/js/jquery.flot.errorbars.js: Added.
        * public/js/jquery.flot.fillbetween.js: Added.
        * public/js/jquery.flot.js: Added.
        * public/js/jquery.flot.min.js: Removed.
        * public/js/jquery.flot.navigate.js: Added.
        * public/js/jquery.flot.resize.js: Added.
        * public/js/jquery.flot.selection.js: Added.
        * public/js/jquery.flot.stack.js: Added.
        * public/js/jquery.flot.symbol.js: Added.
        * public/js/jquery.flot.threshold.js: Added.
        * public/js/jquery.flot.time.js: Added.
        * public/js/jquery.js: Added.

2013-01-29  Ryosuke Niwa  <rniwa@webkit.org>

        Return NaN instead of throwing when there aren't enough samples.

        Reviewed by Sam Weinig.

        It's better to return NaN when we don't have enough samples so that we can treat it
        as if we don't have any confidence interval.

        * public/js/statistics.js:
        (Statistics.new):

2013-01-28  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Apparently Safari sometimes appends / at the end of hash location. Remove that.

        * public/js/helper-classes.js:
        (URLState.parseIfNeeded):

2013-01-28  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13081582> SafariPerfMonitor: Always use parameterized SQL functions in php code

        Reviewed by Ricky Mondello.

        Parameterized execute_query_and_expect_one_row_to_be_affected and updated the code accordingly.

        * public/admin/aggregators.php: Use heredoc.
        * public/admin/builders.php:
        * public/admin/jobs.php:
        * public/admin/repositories.php:
        * public/admin/tests.php: Updated the forms to use unprefixed field names to match other pages.
        This allows us to use update_field when updating test's url and metric's unit. Changed the action
        to regenerate aggregated matrix from "update" to "add" to simplify the dependencies in if-else.
        Also removed a stray code to update unit and url simultaneously since it's never used.
        * public/include/admin-header.php:
        (execute_query_and_expect_one_row_to_be_affected): Added $params. Also automatically convert
        empty strings to NULL as it was previously done via $db->quote_string_or_null_if_empty in callers.
        (update_field): Moved from repositories.php.
        (add_job):
        * public/include/db.php:
        (quote_string_or_null_if_empty): Removed now that nobody uses this function.

2013-01-25  Ryosuke Niwa  <rniwa@webkit.org>

        Build fixes. Treat mean, sum, and square sum as float, not int.

        Also use 95% confidence interval instead of 90% confidence interval.

        * public/api/runs.php:
        * public/js/helper-classes.js:
        (.this.confidenceIntervalDelta):

2013-01-24  Ryosuke Niwa  <rniwa@webkit.org>

        Add an administrative page to edit repository information.

        Reviewed by Ricky Mondello.

        * public/admin/repositories.php: Added.
        * public/include/admin-header.php:

2013-01-23  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13067539> SafariPerfMonitor: Automatically create aggregated metrics from builder reports

        Reviewed by Ricky Mondello.

        Auto-create aggregated matrix such as arithmetic means and geometric means as requested and add a job
        to aggregate results for those matrix in populate-from-report.js.

        * database/generate-manifest.js:
        (.): Include aggregator names such as Arithmetic and Geometric in the list of metrics.
        * database/init-database.sql: Remove an erroneous unique constraint. There could be multiple matrix that share
        the same test and name (e.g. Dromaeo, Time) with different aggregators (e.g. Arithmetic and Geometric).
        * database/populate-from-report.js:
        (main):
        (getReport): No change even though the diff looks as if it moved.
        (processReport): Extracted from main. Fetch the list of aggregators, pass that to recursivelyEnsureTestsIdsAndMetricsIds
        to obtain the list of aggregated metrics (such as arithmetic means) that need to be passed to aggregate.js
        (scheduleJobs): Extracted from processReport. Add a job to aggregate results.
        (recursivelyEnsureTestsIdsAndMetricsIds): When a metric is a list of names, assume them as aggregator names,
        and add corresponding metrics for them. Note we convert those names to ids using the dictionary we obtained
        in processReport.
        (ensureMetricId): Take an aggregator id as an argument.
        * database/process-jobs.js: Support multiple metric ids and build id. Note that aggregate.js aggregates results
        for all builds when the build id is not specified.
        * public/admin/tests.php:
        * public/index.html: Include the aggregator name in the full name since there could be multiple metrics
        of the same name with different aggregators.

2013-01-22  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Don't pass in arguments to in the wrong order.

        * database/aggregate.js:

2013-01-21  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/13057110> SafariPerfMonitor: x-axis is messed up

        Reviewed by Ricky Mondello.

        Since the version of flot we use doesn't support showing graphs in the current locate or
        in a specific timezone, convert all timestamps to PST manually (Date's constructor will still
        treat them as in UTC). We don't want to use the current locate because other websites on
        webkit.org assume PST.

        Also append this information to build's label.

        * public/js/helper-classes.js:
        (TestBuild):
        (TestBuild.label):

2013-01-21  Ryosuke Niwa  <rniwa@webkit.org>

        Store test URLs reported by builders.

        Reviewed by Ricky Mondello.

        * database/populate-from-report.js:
        (recursivelyEnsureTestsIdsAndMetricsIds): Pass in the test url.
        (ensureTestId): Store the URL.

2013-01-20  Ryosuke Niwa  <rniwa@webkit.org>

        Yet another build fix; don't blow up even if we didn't have any test configurations.

        * public/admin/tests.php:

2013-01-21  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix; don't instantiate Date when a timestamp wasn't provided.

        * database/populate-from-report.js:

2013-01-18  Ryosuke Niwa  <rniwa@webkit.org>

        Rename SafariPerfDashboard to SafariPerfMonitor and add a install manual.

        Reviewed by Tim Horton.

        Added an install manual.

        * InstallManual: Added.

2012-12-21  Ryosuke Niwa  <rniwa@webkit.org>

        Minor build fix. Don't unset builderPassword when it's not set.

        * public/api/report.php:

2012-12-18  Ryosuke Niwa  <rniwa@webkit.org>

        Prettify JSON payloads and make very large payloads not explode the table in jobs.php.

        Reviewed by Ricky Mondello.

        * public/admin/admin.css: Make a very large payload scrollable.
        * public/admin/jobs.php: Format JSONs.

2012-12-19  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/12897424> SafariPerfMonitor: Add ability to report results from bots

        Reviewed by Ricky Mondello.

        Add report.php and populate-from-report.js that process JSON files submitted by builders.

        * database/populate-from-report.js: Added.
        (main):
        (getReport): Obtains the payload (the actual report) from "jobs" table.
        (recursivelyEnsureTestsIdsAndMetricsIds): "reports.tests" contain a tree of tests, test metrics,
        and their results. This function recursively traverses tests and metrics and ensure their ids.
        (ensureTestId):
        (metricToUnit): Maps a metric name to a unit. This should really be done in the client side since
        there is no point in storing unit given that every metric maps to exactly one unit (i.e. the mapping
        is a "function" in mathematical sense).
        (ensureMetricId):
        (ensureRepositoryIdsForAllRevisions):
        (getIdOrCreateBuildWithRevisions):
        (ensureBuildIdAndRevisions): Obtains a build id given a builder name, a build number, and a build time
        if one already exists. If not, then inserts a new build and corresponding revisions information (e.g.
        build 123 may contain WebKit revision r456789). We don't retrieve rows for revisions since we don't use
        it elsewhere.
        (insertRun): Insert new rows into "test_runs" and "run_iterations" tables, thereby recording the new
        test results all in a single transaction. This allows us to keep the database consistent in that either
        a build has been reported or not at least in "test_runs" and "run_iterations" tables. It'll be ideal if
        we could do the same for "builds" and "build_revisions" but that's not a hard requirement as far as
        other parts of the application are concerned.
        (scheduleQueriesToInsertRun):
        * database/process-jobs.js: Add a call to populate-from-report.js.
        * public/api/report.php: Added. Adds a new job named "report" to be processed by populate-from-report.js.
        * public/include/db.php: Support parameterized query.
        * public/include/json-header.php: Always include 'status' in the response so that builder submitting
        a test result could confirm that the submission indeed succeeded.

2012-12-18  Ryosuke Niwa  <rniwa@webkit.org>

        Rename get(Id)OrCreate*(Id) to ensure*Id as suggested by Ricky on one of his code reviews.

        * database/aggregate.js:
        * database/database-common.js:
        (selectColumnCreatingRowIfNeeded):
        (ensureRepositoryId):
        (ensureConfigurationIdFromList):
        * database/perf-webkit-migrator.js:
        (.migrateStat.):
        (.migrateStat):
        (getOrCreateBuildId):

2012-12-17  Ryosuke Niwa  <rniwa@webkit.org>

        Extract commonly-used functions from aggregate.js and perf-webkit-migrator.js.

        Reviewed by Ricky Mondello.

        As a preparation to add report.js that processes a JSON file submitted by bots, extract various functions
        and classes from aggregate.js and perf-webkit-migrator.js to be shared.

        * database/aggregate.js: Extracted TaskQueue and SerializedTaskQueue into utility.js.
        (main):
        (processBuild):
        (saveAggregatedResults):
        * database/database-common.js:
        (getIdOrCreatePlatform): Extracted from webkit-perf-migrator.js.
        (getIdOrCreateRepository): Ditto.
        (getConfigurationsForPlatformAndMetrics): Renamed from fetchConfigurations. Extracted from aggregator.js.
        (getIdFromListOrInsertConfiguration): Renamed from getOrInsertConfiguration. Extracted from aggregator.js.
        * database/perf-webkit-migrator.js:
        * database/utility.js: Added.
        (TaskQueue): Extracted from aggregator.js. Fixed a bug that prevented tasks added after start() is called
        from being executed.
        (TaskQueue.startTasksInQueue): Execute remaining tasks without serializing them. If the queue is empty,
        call the callback passed into start().
        (TaskQueue.taskCallback): The function each task calls back. Decrement the counter and call statTasksInQueue.
        (TaskQueue.addTask):
        (TaskQueue.start):
        (SerializedTaskQueue): Unlike TaskQueue, this class executes each task sequentially.
        (SerializedTaskQueue.executeNextTask):
        (SerializedTaskQueue.addTask):
        (SerializedTaskQueue.start):

2012-12-18  Ryosuke Niwa  <rniwa@webkit.org>

        Revert erroneously committed changes.

        * database/config.json:

2012-12-18  Ryosuke Niwa  <rniwa@webkit.org>

        aggregator.js should be able to accept multiple metric ids and a single build id.

        Reviewed by Ricky Mondello.

        Make aggregator.js accept multiple ids and generate results for single build when bots are
        reporting new results.

        * database/aggregate.js:
        (parseArgv): Added. Returns an object containing the parsed representation of argv,
        which currently contains metricIDs and buildIds.
        (main): Use parseArgv and processConfigurations
        (processPlatform): Use build ids passed in or obtain all builds for the given platform.
        (processPlatform.processConfigurations): Extracted.

2012-12-17  Ryosuke Niwa  <rniwa@webkit.org>

        Add an administrative page for builders.

        Reviewed by Ricky Mondello.

        We need an administrative page to add and edit builder information.
        Also renamed "slaves" to "builders" in order to reduce the amount of technical jargon we use.

        * database/init-database.sql: Renamed slaves table to builders. Drop slave_os and slave_spec
        since we don't have plans to use those columns in near future. Also make builder_name unique
        as required by the rest of the app.
        * public/admin/builders.php: Added.
        * public/api/runs.php: Updated per the table rename.
        * public/include/admin-header.php: Added a link to builders.php.

2012-12-14  Ryosuke Niwa  <rniwa@webkit.org>

        Build fixes for r46982.

        * database/aggregate.js:
        (fetchConfigurations):  Bind i so that it's not always metricIds.length.
        (fetchBuildsForPlatform): Return run_build as build_id since that's what caller expects.
        (processBuild): Don't print "." until we've committed transactions. It's misleading.

2012-12-13  Ryosuke Niwa  <rniwa@webkit.org>

        Unreviewed. Move some php files to public/include as suggested by Mark on a code review.

        * public/admin/aggregators.php:
        * public/admin/footer.php: Removed.
        * public/admin/header.php: Removed.
        * public/admin/index.php:
        * public/admin/jobs.php:
        * public/admin/tests.php:
        * public/api/json-header.php: Removed.
        * public/api/runs.php:
        * public/db.php: Removed.
        * public/include: Added.
        * public/include/admin-footer.php: Copied from public/admin/footer.php.
        * public/include/admin-header.php: Copied from public/admin/header.php.
        * public/include/db.php: Copied from public/db.php.
        * public/include/json-header.php: Copied from public/api/json-header.php.

2012-12-13  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/12822613> SafariPerfMonitor: implement naive value aggregation mechanism

        Reviewed by Ricky Mondello.

        Added the initial implementation of value aggregation.
        Also added abilities to configure the dashboard page in tests.php.

        * database/aggregate.js: Added.
        (TaskQueue): Added. Execute all tasks at once and waits for those tasks to complete.
        (TaskQueue.addTask):
        (TaskQueue.start):
        (SerializedTaskQueue): Added. Execute tasks sequentially after one another until all of them are completed.
        (SerializedTaskQueue.addTask):
        (SerializedTaskQueue.start):
        (main):
        (processPlatform):
        (fetchConfigurations):
        (fetchBuildsForPlatform):
        (processBuild):
        (testsWithDifferentIterationCounts):
        (aggregateIterationsForMetric): Retrieve run_iterations and aggregate results in memory.
        (saveAggregatedResults): Insert into test_runs and test_config in transactions.
        (getOrInsertConfiguration):
        (fetchAggregators):
        * database/database-common.js:
        (fetchTable): Log an error as an error.
        (getOrCreateId): Extracted from perf-webkit-migrator.
        (statistics): Added.
        * database/perf-webkit-migrator.js:
        (migrateTestConfig): Converted units to respective metric names. Also removed the code to add jobs to update
        runs JSON since runs JSONs are generated on demand now.
        (migrateStat):
        (getOrCreatePlatformId):
        (getOrCreateTestId):
        (getOrCreateConfigurationId):
        (getOrCreateRevisionId):
        (getOrCreateRepositoryId):
        (getOrCreateBuildId):
        * database/process-jobs.js:
        (processJob): Handle 'aggregate' type.

2012-12-11  Ryosuke Niwa  <rniwa@webkit.org>

        Fix the dashboard after adding test_metrics.

        Reviewed by Ricky Mondello.

        Rename test to metrics in various functions and sort tests on the charts page.
        Also representing whether a test appears or not by setting a flag on dashboard
        was bogus because test objects are shared by multiple platforms. Instead, store
        dashboard platform list as intended by the manifest JSON.

        * public/index.html:
        (PerfTestRuns): Renamed test to metric.
        (fetchTest): Ditto.
        (showCharts): Ditto; also sort metrics' full names before adding them to the select element.
        (fullName): Moved so that it appears above where it's called.
        * public/js/helper-classes.js:

2012-12-10  Ryosuke Niwa  <rniwa@webkit.org>

        Update tests.php to reflect recent changes in the database schema.

        Reviewed by Conrad Shultz.

        Made the following changes to tests.php:
        1. Disallow adding metrics to tests without subtests.
        2. Made dashboard configurable by adding checkboxes for each platform on each metric.
        3. Linkified tests with subtests instead of showing all them at once.

        * public/admin/admin.css:
        (.action-field, .notice):
        (label):
        * public/admin/header.php: Specify paths by absolute paths so that tests.php can use PATH_INFO.
        (execute_query_and_expect_one_row_to_be_affected): Return a boolean. Used in tests.php while adding test_metrics.
        (add_job): Extracted.
        * public/admin/tests.php: See above.
        (array_item_set_default): Added.
        (array_item_or_default): Renamed from get_value_with_default.
        (compute_full_name): Extracted.
        (sort_tests): Ditto.
        (map_metrics_to_tests): Ditto.

2012-12-06  Ryosuke Niwa  <rniwa@webkit.org>

        <rdar://problem/12832324> SafariPerfMonitor: Linkify test names

        Reviewed by Simon Fraser.

        Linkify the headers using metric.test.url when it's provided.

        * public/index.html:

2012-12-03  Ryosuke Niwa  <rniwa@webkit.org>

        Use parameterized pg_query_params in query_and_fetch_all

        Reviewed by Conrad Shultz.

        Address a review comment by Mark by using pg_query_params instead of pg_query in query_and_fetch_all.

        * public/api/runs.php:
        * public/db.php:
        (ctype_alnum_underscore): Added.

2012-12-04  Ryosuke Niwa  <rniwa@webkit.org>

        Update the migration tool to support test_metrics.

        Reviewed by Mark Rowe.

        Updated the migration tool from webkit-perf.appspot.com to support test_metrics.
        Also import run_iteration rows as runs JSON files now include individual values.

        * database/database-common.js:
        (addJob): Extracted.
        * database/perf-webkit-migrator.js:
        (migrateTestConfig): Interchange the order in which we fetch runs and add configurations
        so that we can pass in the metric name and unit to getOrCreateConfigurationId.
        (getOrCreateConfigurationId): Updated to add both test configuration and test metric.
        (ensureCheckout):

2012-12-03  Ryosuke Niwa  <rniwa@webkit.org>

        Build fix. Suppress "Undefined index" warning.

        * public/admin/tests.php:

2012-12-03  Ryosuke Niwa  <rniwa@webkit.org>

        Fix a commit error in r46756. api/ should obviously be added under public/

        * api: Removed.
        * api/json-header.php: Removed.
        * api/runs.php: Removed.
        * public/api: Copied from api.

2012-12-03  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Linkify revisions and revisions range
        <rdar://problem/12801010>

        Reviewed by Mark Rowe.

        Linkify revisions in TestBuild.label. Pass in manifest.repositories to TestBuild's constructor
        since it needs to know "url" and "blameUrl".

        Also tweaked the appearance of graphs on charts page to better align graphs when unit names are long.

        * public/index.html:
        * public/js/helper-classes.js:
        (TestBuild):
        (TestBuild.revision): Renamed from webkitRevision. Now returns an arbitrary revision number.
        (TestBuild.label): Add labels for all revisions.
        (TestBuild):
        (.ensureContainer):

2012-12-03  Ryosuke Niwa  <rniwa@webkit.org>

        Make the generation of "runs" JSON dynamic and support test_metrics.

        Reviewed by Mark Rowe.

        It turned out that we can fetch all runs for a given configuration in roughly 100-200ms.

        Since there could be hundreds, if not thousands, of tests for each configuration and users
        aren't necessarily interested in looking at all test results, it's much more efficient to
        generate runs JSON dynamically (i.e. polling) upon a request instead of generating all of them
        when bots report new results (i.e. pushing).

        Rewrote the script to generate runs JSON in php and also supported test_metrics table.

        * api: Added.
        * api/json-header.php: Added. Sets Content-Type and cache policies (10 minutes by default).
        (exit_with_error): Added.
        (successful_exit): Added.
        * api/runs.php: Added. Ported database/database-common.js. It's much shorter in php!
        * database/generate-runs.js: Removed.
        * database/process-jobs.js: No longer supports "runs".
        * public/.htaccess: Added. Always add MultiView so that api/runs can receive a path info.
        * public/db.php: Print "Nothing to see here." when it's accessed directly.
        (ends_with): Added.
        * public/index.html: Fetch runs JSONs from /api/runs/ instead of data/.

2012-12-03  Ryosuke Niwa  <rniwa@webkit.org>

        Update tests.php and sample-data.sql per addition of test_metrics.

        Rubber-stamped by Timothy Hatcher.

        Remove a useless code from tests.php that used to update the unit and the url of a test
        since it's no longer used, and add the UI and the ability to add a new aggregator to a test.

        Also update the sample data to reflect the addition of test_metrics.

        * database/sample-data.sql:
        * public/admin/tests.php:

2012-11-30  Ryosuke Niwa  <rniwa@webkit.org>

        Share more code between admin pages.

        Reviewed by Timothy Hatcher.

        Added notice and execute_query_and_expect_one_row_to_be_affected helper functions to share more code
        between admin pages.

        Also moved the code to connect to the database into header.php to be shared. Admin pages just need
        to check the nullity of global $db now.

        * public/admin/aggregators.php:
        * public/admin/header.php:
        (notice): Added
        (execute_query_and_expect_one_row_to_be_affected): Added.
        * public/admin/index.php:
        * public/admin/jobs.php:
        * public/admin/tests.php:

2012-11-29  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Add admin page to edit aggregators
        <rdar://problem/12782687>

        Reviewed by Mark Rowe.

        Add aggregators.php. It's very simple. We should probably share more code between various admin pages.

        * public/admin/aggregators.php: Added.
        * public/admin/header.php:
        * public/admin/jobs.php: Removed an erroneous hidden input element.

2012-11-28  Ryosuke Niwa  <rniwa@webkit.org>

        Fix a syntax error in init-database.sql and add the missing drop table at the beginning.

        * database/init-database.sql:

2012-11-28  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Allow multiple metrics per test
        <rdar://problem/12773506>

        Rubber-stamped by Mark Rowe.

        Introduce a new table test_metrics. This table represents metrics each test can have
        such as time, memory allocation, frame rate as well as aggregation such as arithmetic mean
        and geometric mean.

        Updated admin/tests.php and index.html accordingly.

        Also create few indexes based on postgres' "explain analysis" as suggested by Mark.

        * database/generate-manifest.js:
        (buildPlatformMapIfPossible):
        * database/generate-runs.js:
        (fetchRuns):
        * database/init-database.sql:
        * database/schema.graffle:
        * public/admin/admin.css:
        (table):
        (tbody.odd):
        * public/admin/tests.php:
        * public/index.html:

2012-11-27  Ryosuke Niwa  <rniwa@webkit.org>

        SafariPerfMonitor: Improve the webkit-perf migration tool
        <rdar://problem/12760882>

        Reviewed by Mark Rowe.

        Make the migrator tool skip runs when fetching runs failed since webkit-perf.appspot.com is unreliable
        and we don't want to pause the whole importation process until the user comes back to decide whether
        to retry or not.

        Also place form controls next to each test in tests.php so that users don't have to scroll all the way
        down to make modifications.

        Finally, add unique constraint to (run_config, run_build) in test_runs table in order to optimize a query
        of the form: "SELECT run_id FROM test_runs WHERE run_config = $1 AND run_build = $2",

        * database/init-database.sql:
        * database/perf-webkit-migrator.js:
        (migrateTestConfig):
        * database/schema.graffle:
        * public/admin/admin.css:
        (table):
        * public/admin/tests.php:

2012-11-16  Ryosuke Niwa  <rniwa@webkit.org>

        Create a new performance dashboard
        <rdar://problem/12625582>

        Rubber-stamped by Mark Rowe.

        Add the initial implementation of the perf dashboard.

        * database: Added.
        * database/config.json: Added.
        * database/database-common.js: Added.
        (connect):
        (fetchTable):
        (manifestPath):
        (pathToRunsJSON):
        (pathToLocalScript):
        (config):
        * database/generate-manifest.js: Added.
        (ensureProperty):
        (buildTestMap):
        (buildPlatformMapIfPossible):
        (generateFileIfPossible):
        * database/perf-webkit-migrator.js: Added.
        * database/process-jobs.js: Added.
        * database/sample-data.sql: Added.
        * database/schema.graffle: Added.
        * public: Added.
        * public/admin: Added.
        * public/admin/README: Added.
        * public/admin/admin.css: Added.
        * public/admin/footer.php: Added.
        * public/admin/header.php: Added.
        * public/admin/index.php: Added.
        * public/admin/jobs.php: Added.
        * public/admin/tests.php: Added.
        * public/common.css: Added.
        * public/data: Added.
        * public/db.php: Added.
        * public/index.html: Added.
        * public/js: Added.
        * public/js/helper-classes.js: Added.
        * public/js/jquery-1.8.2.min.js: Added.
        * public/js/jquery.flot.min.js: Added.
        * public/js/jquery.flot.plugins.js: Added.
        * public/js/shared.js: Added.
        (fileNameFromPlatformAndTest):
        * public/js/statistics.js: Added.