Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 3692b888d679c7ba3759f4394f46bf0f36b5bbf3
https://github.com/WebKit/WebKit/commit/3692b888d679c7ba3759f4394f46bf0f36b5bbf3
Author: Yusuke Suzuki <[email protected]>
Date: 2026-03-04 (Wed, 04 Mar 2026)
Changed paths:
M Source/JavaScriptCore/runtime/MicrotaskQueue.cpp
M Source/JavaScriptCore/runtime/MicrotaskQueue.h
M Source/JavaScriptCore/runtime/MicrotaskQueueInlines.h
Log Message:
-----------
[JSC] Micro-optimize MicrotaskQueue drain code
https://bugs.webkit.org/show_bug.cgi?id=309139
rdar://171685259
Reviewed by Justin Michaud.
We carefully analyze the sampling profiler data and clean up some
unnecessary code.
1. We specialize drainImpl<true> / drainImpl<false> to make sure that we
do not need to have a code for useCallOnEachMicrotask.
2. Use TopLevelScope in runMicrotask too, carrying Termination exception
information to the caller.
* Source/JavaScriptCore/runtime/MicrotaskQueue.cpp:
(JSC::runMicrotask):
(JSC::runMicrotaskWithDebugger):
(JSC::MicrotaskQueue::drainImpl):
(JSC::MicrotaskQueue::drainWithoutUseCallOnEachMicrotask):
(JSC::MicrotaskQueue::drainWithUseCallOnEachMicrotask):
(JSC::MicrotaskQueue::drain): Deleted.
* Source/JavaScriptCore/runtime/MicrotaskQueue.h:
(JSC::MicrotaskQueue::drain):
* Source/JavaScriptCore/runtime/MicrotaskQueueInlines.h:
(JSC::MicrotaskQueue::performMicrotaskCheckpoint):
Canonical link: https://commits.webkit.org/308635@main
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