[Webkit-unassigned] [Bug 216677] New: REGRESSION(r267137): PaintFrequencyTracker needs to track all the painting

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=216677

            Bug ID: 216677
           Summary: REGRESSION(r267137): PaintFrequencyTracker needs to
                    track all the painting
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: sabouhallawa at apple.com
                CC: bfulgham at webkit.org, simon.fraser at apple.com,
                    zalan at apple.com

r267137 made PaintFrequencyTracker track only the painting which comes through Page::updateRendering(). This caused ~30% regression in the MotionMark Design test because it enlarged the gap between the paintings. So PaintFrequencyTracker will never encounter a PaintFrequency::High. This means we lost the optimization that could be gained from replaying back the DisplayList of the text runs.

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