Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: d4ab1891c608410ee20bfffa1e7028d11e25bcf5
https://github.com/WebKit/WebKit/commit/d4ab1891c608410ee20bfffa1e7028d11e25bcf5
Author: Jer Noble <[email protected]>
Date: 2026-01-06 (Tue, 06 Jan 2026)
Changed paths:
M Source/WebCore/platform/audio/ios/AudioSessionIOS.h
M Source/WebCore/platform/audio/ios/AudioSessionIOS.mm
Log Message:
-----------
REGRESSION(304297@main) Increased CPU usage in audiomxd during playback
rdar://166810468
https://bugs.webkit.org/show_bug.cgi?id=305010
Reviewed by Eric Carlson.
304297@main fixed a behavior issue by calling
HTMLMediaElement::canProduceAudioChanged()
in more circumstances than previously, but this had the side effect of
increasing the
CPU usage in audiomxd as a result of certain properties being changed more
often.
Specifically, the excess CPU time was spent executing
-setPreferredIOBufferDuration:.
Reduce the cost of calling this method by caching the set value and returing
early if
the same value is passed into AudioSessionIOS::setPreferredBufferSize().
* Source/WebCore/platform/audio/ios/AudioSessionIOS.h:
* Source/WebCore/platform/audio/ios/AudioSessionIOS.mm:
(-[WebInterruptionObserverHelper initWithCallback:]):
(-[WebInterruptionObserverHelper sessionMediaServicesWereReset:]):
Canonical link: https://commits.webkit.org/305191@main
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