Bug 255254

Summary:	[UI-side compositing] Scrolling is not as smooth as it should be on 120Hz displays
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

Description Simon Fraser (smfr) 2023-04-10 15:36:04 PDT

The scrolling thread blocks on RemoteLayerTreeEventDispatcher::waitForRenderingUpdateCompletionOrTimeout() for too long (up to 8ms) on 120Hz displays, when it should only block for 4ms.

Comment 1 Simon Fraser (smfr) 2023-04-10 15:36:15 PDT

rdar://107837416

Comment 2 Simon Fraser (smfr) 2023-04-10 15:43:02 PDT

Pull request: https://github.com/WebKit/WebKit/pull/12591

Comment 3 EWS 2023-04-10 19:25:03 PDT

Committed 262801@main (80da2ab73cf5): <https://commits.webkit.org/262801@main>

Reviewed commits have been landed. Closing PR #12591 and removing active labels.