[Webkit-unassigned] [Bug 64851] New: [chromium]Optimize AnimationController::updateAnimations

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=64851

           Summary: [chromium]Optimize
                    AnimationController::updateAnimations
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: PC
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Layout and Rendering
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: huiqing.zeng at intel.com


For loading page w/ transition property(CSS3), FF4 ~5.5X faster than Chromium.

Through analysis, we find that the root cause is that w/ transition, when a dom element is attached, it will call RenderObject::setAnimatableStyle, then AnimationController::updateAnimations, and it will call AnimationController::updateAnimationTimer, which is the hotspot.

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