Bug 312959

Summary:	Avoid updating UI-side layer positions for no-op transactions
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	Scrolling	Assignee:	Simon Fraser (smfr) <simon.fraser>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified

Simon Fraser (smfr)

Reported 2026-04-21 21:17:07 PDT

If a page is running a no-op requestAnimationFrame, or doing other things that trigger RemoteLayerTreeTransactions with no scrolling tree changes, then we don't need to run `applyLayerPositions` in the UI process for such transactions.

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Radar WebKit Bug Importer

Comment 1 2026-04-21 21:17:13 PDT

<rdar://problem/175308880>

Simon Fraser (smfr)

Comment 2 2026-04-21 21:22:42 PDT

Pull request: https://github.com/WebKit/WebKit/pull/63293

EWS

Comment 3 2026-04-22 17:11:20 PDT

Committed 311816@main (8ff9ee25d0ec): <https://commits.webkit.org/311816@main> Reviewed commits have been landed. Closing PR #63293 and removing active labels.

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