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[WebKit-https.git] / PerformanceTests / Mutation / append-child-deep.html
1 <!DOCTYPE html>
2 <body>
3 <pre id="log"></pre>
4 <script src="../resources/runner.js"></script>
5 <div id="sandbox" style="display:none"></div>
6 <script>
7 var sandbox = document.getElementById('sandbox');
8 var node = sandbox;
9 for (var i = 0; i < 200; ++i)
10     node = node.appendChild(document.createElement('div'));
11 var elems = [];
12 for (var i = 0; i < 50000; ++i)
13     elems[i] = document.createElement('div');
14 var observing = false;
15
16 var observer = new WebKitMutationObserver(listener);
17 var tickledSpan = document.createElement('span');
18 observer.observe(tickledSpan, {attributes: true});
19
20 function resetState() {
21     window.start = null;
22     window.numRuns = 25;
23     window.times = [];
24 }
25
26 function runAgain() {
27     tickledSpan.setAttribute('data-foo', numRuns);
28 }
29
30 function listener(mutations) {
31     if (start) {
32         var time = Date.now() - start;
33         times.push(time);
34         PerfTestRunner.log(time);
35     }
36     if (numRuns-- >= 0) {
37         runAgain();
38         if (observing)
39             observer.disconnect()
40         node.innerHTML = '';
41         if (observing)
42             observer.observe(sandbox, {childList: true, subtree: true});
43         start = Date.now();
44         for (var i = 0; i < elems.length; ++i)
45             node.appendChild(elems[i]);
46     } else {
47         PerfTestRunner.logStatistics(times);
48         if (!observing) {
49             observing = true;
50             resetState();
51             PerfTestRunner.log('\n------------\n');
52             PerfTestRunner.log('Running ' + numRuns + ' times with observation');
53             setTimeout(runAgain, 0);
54         }
55     }
56 }
57
58 resetState();
59 PerfTestRunner.log('Running ' + numRuns + ' times without observation');
60 window.addEventListener('load', runAgain);
61 </script>
62 </body>