Bug 295434

Summary: REGRESSION (294844@main): Choppy scrolling on kottke.org
Product: WebKit Reporter: Simon Fraser (smfr) <simon.fraser>
Component: Layout and RenderingAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Other   
Hardware: Unspecified   
OS: Unspecified   

Simon Fraser (smfr)
Reported 2025-07-03 13:22:20 PDT
kottke.org has some repeating gradients with `background-attachment:fixed`, which means they paint on every scroll. The color stop colorspace conversion added in 294844@main runs on every stop, so we end up doing hundreds of redundant conversions per paint. <rdar://152254822>
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Simon Fraser (smfr)
Comment 1 2025-07-03 13:26:53 PDT
Pull request: https://github.com/WebKit/WebKit/pull/47576
EWS
Comment 2 2025-07-04 13:34:36 PDT
Committed 297029@main (b42f9106d954): <https://commits.webkit.org/297029@main> Reviewed commits have been landed. Closing PR #47576 and removing active labels.
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