[Webkit-unassigned] [Bug 133179] New: Poor 3D css animation in nightly

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=133179

           Summary: Poor 3D css animation in nightly
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Macintosh Intel
               URL: http://www.jtechcommunications.com
        OS/Version: Mac OS X 10.9
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Animations
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: pmilvich at gmail.com
                CC: dino at apple.com


In the nightly build for webkit the 3d portion of the animation on the home page of http://www.jtechcommunications.com suffers from bad performance. This animation is nice and smooth in Safari 7.0.3.

The animation is using the rekapi library (http://rekapi.com) to dynamically create the css animation code and inject it as a style. I suspect it's related to the latest work on the JIT css.

Disabling the dynamic css generation and simply setting the values speeds it up on the nightly build, though it is still slower than Safari 7.0.3 w/o the css. (w/o access to the code you can get the non-css generating version by setting the user agent to be chrome - we only had the css version enabled on webkit for safari)

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