[webkit-changes] [WebKit/WebKit] a776b3: REGRESSION (266680 at main): iOS PLUM ~0.75% increase...

[Wenson Hsieh]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: a776b382b039176264e7a49623eefc20bf87b4a2
      https://github.com/WebKit/WebKit/commit/a776b382b039176264e7a49623eefc20bf87b4a2
  Author: Wenson Hsieh <wenson_hsieh at apple.com>
  Date:   2023-10-04 (Wed, 04 Oct 2023)

  Changed paths:
    M Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml
    M Source/WebCore/page/OpportunisticTaskScheduler.cpp

  Log Message:
  -----------
  REGRESSION (266680 at main): iOS PLUM ~0.75% increased memory use
https://bugs.webkit.org/show_bug.cgi?id=262575
rdar://114845469

Reviewed by Per Arne Vollan and Ryosuke Niwa.

Add a runtime-enabled setting to control whether or not the opportunistic task scheduler should be
enabled for the purposes of opportunistic sweeping and GC. This currently causes a memory regression
on PLUM, specifically on certain iPhone models.

* Source/WTF/Scripts/Preferences/UnifiedWebPreferences.yaml:
* Source/WebCore/page/OpportunisticTaskScheduler.cpp:
(WebCore::OpportunisticTaskScheduler::runLoopObserverFired):

Canonical link: https://commits.webkit.org/268882@main