Bug 254118

Summary:	[UI-side compositing] A no-op rendering update still triggers a WindowServer update
Product:	WebKit	Reporter:	Simon Fraser (smfr) <simon.fraser>
Component:	WebKit Process Model	Assignee:	Simon Fraser (smfr) <simon.fraser>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Unspecified

Description Simon Fraser (smfr) 2023-03-18 11:40:05 PDT

A page that runs requestAnimationFrame() which doesn't trigger any rendering will still trigger UI-process CA commits, and thus WindowServer updates. This is a power drain.

Comment 1 Simon Fraser (smfr) 2023-03-18 11:40:15 PDT

<rdar://106790532>

Comment 2 Simon Fraser (smfr) 2023-03-18 11:45:29 PDT

Pull request: https://github.com/WebKit/WebKit/pull/11684

Comment 3 EWS 2023-03-18 16:56:27 PDT

Committed 261831@main (ffac46f94d52): <https://commits.webkit.org/261831@main>

Reviewed commits have been landed. Closing PR #11684 and removing active labels.