[Webkit-unassigned] [Bug 79389] Hitch (due to style recalc?) when starting CSS3 animation

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=79389





--- Comment #9 from Rob Arnold <robarnold at fb.com>  2012-03-16 17:14:49 PST ---
(In reply to comment #7)
> Interesting. Do you have a trac link for when that was added?

I misread the patch - it was https://bugs.webkit.org/show_bug.cgi?id=19938 which added the webkitAnimation* event and AnimationStyleChange (later renamed for WebGL).

(In reply to comment #8)
> In the code: 
> 
> // SyntheticStyleChange means that we need to go through the entire style change logic even though
> // no style property has actually changed. It is used to restructure the tree when, for instance,
> // RenderLayers are created or destroyed due to animation changes.
> 
> So would be interesting test sites using complex animations.

I was hoping that this would be covered by existing tests but I can start looking for some. Our internal prototypes appear to be working at least though I don't think they are cover enough of the edge cases.

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