Bug 323436

Summary: [Web Animations] Fully accelerated animations unnecessarily invalidate style while a non-accelerated animation is running
Product: WebKit Reporter: Vitaly Dyackhov <vitaly>
Component: New BugsAssignee: Vitaly Dyackhov <vitaly>
Status: RESOLVED FIXED    
Severity: Normal CC: graouts, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
Bug Depends on: 324403    
Bug Blocks:    

Vitaly Dyackhov
Reported 2026-09-04 06:11:39 PDT
When a page has at least one animation that cannot run on the compositor, that animation forces the page to process animation updates on every frame. While this happens, other animations on the same page that are otherwise running entirely on the compositor have their style needlessly recalculated on every update too, and in some cases this can force layout
Attachments
Vitaly Dyackhov
Comment 1 2026-09-04 06:34:34 PDT
EWS
Comment 2 2026-09-08 02:43:56 PDT
Committed 320647@main (1508d59b56eb): <https://commits.webkit.org/320647@main> Reviewed commits have been landed. Closing PR #73060 and removing active labels.
Radar WebKit Bug Importer
Comment 3 2026-09-08 02:44:16 PDT
Nikolas Zimmermann
Comment 4 2026-09-09 04:37:59 PDT
EWS
Comment 5 2026-09-09 07:09:03 PDT
Committed 317695.245@webkitglib/2.54 (6fc5f640beed): <https://commits.webkit.org/317695.245@webkitglib/2.54> Reviewed commits have been landed. Closing PR #73552 and removing active labels.
revert-bot
Comment 6 2026-09-16 18:18:35 PDT
Reopened Bugzilla. http://x.com 2FA input fields have jumpy cursor because of it, tracking revert in https://bugs.webkit.org/show_bug.cgi?id=324403.
Vitaly Dyackhov
Comment 7 2026-10-13 04:14:14 PDT
EWS
Comment 8 2026-10-13 20:49:36 PDT
Committed 323687@main (8f123d9e4085): <https://commits.webkit.org/323687@main> Reviewed commits have been landed. Closing PR #76882 and removing active labels.
Antoine Quint
Comment 9 2026-10-16 02:25:22 PDT
Antoine Quint
Comment 10 2026-11-09 12:56:14 PST
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