[Webkit-unassigned] [Bug 118555] Do not update compositing layers when the style is forced from JavaScript

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=118555





--- Comment #1 from Alexandru Chiculita <achicu at adobe.com>  2013-07-11 02:17:06 PST ---
The issue is visible on http://www.milwaukeepolicenews.com . Scrolling is really bad because the JavaScript listens for scroll events and updates the layout every single frame. There are at least 10-15 style updates for each frame and each update will recalculate the compositing requirements of the layers.

RenderLayerCompositor::updateCompositingLayers takes 96% of the total time while scrolling the document.

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