[Webkit-unassigned] [Bug 254998] New: UI-side compositing: Weather.com background lags when scrolling

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Tue Apr 4 10:33:59 PDT 2023


https://bugs.webkit.org/show_bug.cgi?id=254998

            Bug ID: 254998
           Summary: UI-side compositing: Weather.com background lags when
                    scrolling
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: InRadar
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mattwoodrow at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    webkit-bug-importer at group.apple.com, zalan at apple.com

<rdar://104436838>

When scrolling Weather Channel weather.com — the blue background appears to have to catch up to the scrolling, no issue with UI-side disabled.

ThreadedScrollingTree::canUpdateLayersOnScrollingThread() returns false when scrolling weather.com, so we don’t do any async scrolling using the old code.

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