[Webkit-unassigned] [Bug 149578] New: Touchstart event on dom will delay requestAnimationFrame execution and causes drop frame

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=149578

            Bug ID: 149578
           Summary: Touchstart event on dom will delay
                    requestAnimationFrame execution and causes drop frame
    Classification: Unclassified
           Product: WebKit
           Version: Safari 9
          Hardware: iOS
                OS: iOS 9.0
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Event Handling
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: yjhatfdu at gmail.com

When I touch on a dom, the next requestAnimationFrame will not fired as it was in iOS8,it will delay for about 5ms after the touchStart event done. This makes the html5 games drop frame.

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