276465 2024-07-10 18:32:20 -0700 Making a scroller composited generates repaints for two rendering updates 2024-07-25 10:44:17 -0700 1 1 1 Unclassified WebKit Layout and Rendering WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 1 mattwoodrow mattwoodrow bfulgham simon.fraser webkit-bug-importer zalan oldest_to_newest 2045673 0 mattwoodrow 2024-07-10 18:32:20 -0700 As in title, creating a newly composited scroller paints the scroller in the following rendering update, and then repaints it again (as it switches to painting outside of the directly visible area) on the following rendering update. This adds a bunch of repaint time in speedometer 3 complex DOM cases, where the changes should have happened outside of the measured interval. 2045674 1 webkit-bug-importer 2024-07-10 18:32:36 -0700 <rdar://problem/131502835> 2045677 2 mattwoodrow 2024-07-10 18:46:40 -0700 Pull request: https://github.com/WebKit/WebKit/pull/30675 2046784 3 ews-feeder 2024-07-17 12:33:32 -0700 Committed 281062@main (1e1ce773deb4): <https://commits.webkit.org/281062@main> Reviewed commits have been landed. Closing PR #30675 and removing active labels. 2048354 4 ews-feeder 2024-07-25 10:44:17 -0700 Committed 280938.122@safari-7619-branch (c66461e3b1c8): <https://commits.webkit.org/280938.122@safari-7619-branch> Reviewed commits have been landed. Closing PR #1471 and removing active labels.