Keep around a pre-warmed process when doing process swap on navigation
authorsbarati@apple.com <sbarati@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Tue, 24 Apr 2018 02:03:27 +0000 (02:03 +0000)
committersbarati@apple.com <sbarati@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc>
Tue, 24 Apr 2018 02:03:27 +0000 (02:03 +0000)
https://bugs.webkit.org/show_bug.cgi?id=184765

Reviewed by Ryosuke Niwa.

This patch makes it so that WebProcessPool prewarms a process when process
swap on navigation is turned on. When we do a process swap on navigation,
we first try to grab a prewarmed process before creating a new one.

We try to be smart about when to create these processes. The initial heuristic
that this patch chooses is when we reach the DidFirstVisuallyNonEmptyLayout
layout milestone. We're going to try to improve on this heuristic in:
https://bugs.webkit.org/show_bug.cgi?id=184899

This is a 40% progression on PLT with process swap on navigation turned on.

* UIProcess/ServiceWorkerProcessProxy.cpp:
(WebKit::ServiceWorkerProcessProxy::ServiceWorkerProcessProxy):
* UIProcess/WebPageProxy.cpp:
(WebKit::WebPageProxy::notifyProcessPoolToPrewarm):
(WebKit::WebPageProxy::didFirstVisuallyNonEmptyLayoutForFrame):
* UIProcess/WebPageProxy.h:
* UIProcess/WebProcessPool.cpp:
(WebKit::WebProcessPool::createNewWebProcess):
(WebKit::WebProcessPool::tryTakePrewarmedProcess):
(WebKit::WebProcessPool::warmInitialProcess):
(WebKit::WebProcessPool::disconnectProcess):
(WebKit::WebProcessPool::createWebPage):
(WebKit::WebProcessPool::didReachGoodTimeToPrewarm):
(WebKit::WebProcessPool::processForNavigation):
* UIProcess/WebProcessPool.h:
* UIProcess/WebProcessProxy.cpp:
(WebKit::WebProcessProxy::create):
(WebKit::WebProcessProxy::WebProcessProxy):
(WebKit::m_isInPrewarmedPool):
(WebKit::m_userMediaCaptureManagerProxy): Deleted.
* UIProcess/WebProcessProxy.h:
(WebKit::WebProcessProxy::isInPrewarmedPool const):
(WebKit::WebProcessProxy::setIsInPrewarmedPool):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@230938 268f45cc-cd09-0410-ab3c-d52691b4dbfc


No differences found