[Webkit-unassigned] [Bug 33520] Mapping from local to container coord space is O(N^2)

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=33520





--- Comment #8 from James Robinson <jamesr at chromium.org>  2010-01-13 17:15:44 PST ---
There's a similar issue with computeRectForRepaint(): it's called from
updateLayerPositions(), which traverses from the root to child layers, and it
traverses up to the root element applying transforms at each step.

I would guess that the cleanest way to fix these issues would be to make
LayoutState transform-aware and reuse it when calling updateLayerPositions() to
avoid having to redo transforms from local to repaint container coordinates.

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