Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 21a8c47f4202c17fa5801a519b191dc60f521c54
https://github.com/WebKit/WebKit/commit/21a8c47f4202c17fa5801a519b191dc60f521c54
Author: Jer Noble <jer.no...@apple.com>
Date: 2025-08-29 (Fri, 29 Aug 2025)
Changed paths:
M Source/WebCore/Modules/modern-media-controls/media/tracks-support.js
Log Message:
-----------
[Performance] Media controls ask for localized, sorted list of text tracks,
only to check to see if the list is empty
https://bugs.webkit.org/show_bug.cgi?id=298133
rdar://159479269
Reviewed by Ryan Reno.
As a follow up to 299347@main, much of the CPU time spent by the main thread in
the
Media/VideoElementAddManyTextTracks.html test is spent generating a sorted,
localized list of text
tracks for use by the media controls. However the media controls don't actually
use that sorted
list for anything other than checking whether it's empty. Instead, the controls
can just check
whether the media element's textTracks or audioTracks lists are empty.
This change further increases the performance of the
VideoElementAddManyTextTracks.html peformance
test; the a median iteration time is now 7.5ms, which is over 100x faster than
prior to
299347@main.
* Source/WebCore/Modules/modern-media-controls/media/tracks-support.js:
(TracksSupport.prototype._canPickAudioTracks):
(TracksSupport.prototype._canPickTextTracks):
Canonical link: https://commits.webkit.org/299351@main
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