[Webkit-unassigned] [Bug 84393] Avoid calling updateCompositingLayers() more than once before each render

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=84393





--- Comment #3 from Simon Fraser (smfr) <simon.fraser at apple.com>  2012-04-19 17:34:04 PST ---
I don't think knowing the "reason for layout" in FrameView::layout is enough; you need to know if this is the last layout you'll get before painting happens.

We also have the "sync compositing layer" stuff that is based on a run loop observer but also fires before painting.

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