tree 693a48d1fd1897699bd3734bc5b18c0f88d484ec
parent b34b0aa0a2445ca104daec0235d448a47cf8fd04
author cdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1571719891 +0000
committer cdumez@apple.com <cdumez@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1571719891 +0000

Suspend dedicated worker threads while in the back/forward cache
https://bugs.webkit.org/show_bug.cgi?id=203186
<rdar://problem/56447493>

Reviewed by Ryosuke Niwa.

Source/WebCore:

When a page with a (dedicated) Worker enters the back/forward cache, we now
pause the worker thread, and resume it only when taking the page out of the
back/forward cache. This avoids having the worker use CPU while the page is
in the cache.

* workers/Worker.cpp:
(WebCore::Worker::suspend):
(WebCore::Worker::resume):
* workers/Worker.h:
* workers/WorkerGlobalScopeProxy.h:
* workers/WorkerMessagingProxy.cpp:
(WebCore::WorkerMessagingProxy::suspend):
(WebCore::WorkerMessagingProxy::resume):
(WebCore::WorkerMessagingProxy::workerThreadCreated):
* workers/WorkerMessagingProxy.h:
* workers/WorkerThread.cpp:
(WebCore::WorkerThread::WorkerThread):
(WebCore::WorkerThread::suspend):
(WebCore::WorkerThread::resume):
(WebCore::WorkerThread::stop):
* workers/WorkerThread.h:

LayoutTests:

Extend layout test coverage.

* fast/workers/resources/worker-setInterval.js: Added.
(onmessage):
(setInterval):
* fast/workers/worker-page-cache.html:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@251416 268f45cc-cd09-0410-ab3c-d52691b4dbfc