[Webkit-unassigned] [Bug 164340] New: REGRESSION (r206247): Painting milestones can be delayed until the next layer flush

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=164340

            Bug ID: 164340
           Summary: REGRESSION (r206247): Painting milestones can be
                    delayed until the next layer flush
    Classification: Unclassified
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Keywords: NeedsRadar, Regression
          Severity: Normal
          Priority: P1
         Component: WebKit2
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mitz at webkit.org

After <https://trac.webkit.org/r206247> (the fix for bug 162359), it is possible for the client to not get notified of a paint milestone until the next layer flush, which may or may not occur. This is because WebCore fires painting milestones on a timer, and by the time it does so, the flush for the paint that triggered it may have already happened.

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