RESOLVED FIXED 256624
[UI-side compositing] Eliminate unnecessary invalidate of scrollbar layers when scrolling 
https://bugs.webkit.org/show_bug.cgi?id=256624
Summary [UI-side compositing] Eliminate unnecessary invalidate of scrollbar layers wh...
Simon Fraser (smfr)
Reported 2023-05-10 19:18:39 PDT
Traces show that that we mark the scrollbar layers as needing repaint, and hit GraphicsLayerCA::platformCALayerPaintContents() for them, on every scroll. If these are layers for native scrollbars, we don't paint them in the web process at all (the NSScrollerImps only live in the UI Process), so we shouldn't need to dirty the scrollbar layers.
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Radar WebKit Bug Importer
Comment 1 2023-05-10 19:19:07 PDT
<rdar://problem/109184266>
Nikos Mouchtaris
Comment 2 2023-05-12 17:39:11 PDT
Pull request: https://github.com/WebKit/WebKit/pull/13840
EWS
Comment 3 2023-05-15 17:46:15 PDT
Committed 264094@main (d19192443a84): <https://commits.webkit.org/264094@main> Reviewed commits have been landed. Closing PR #13840 and removing active labels.
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