[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 #13 from Simon Fraser (smfr) <simon.fraser at apple.com>  2010-02-01 18:19:59 PST ---
On a related note, we've talked about removing all the geometry mapping code
(convertToLayerCoords()) in the layer tree and just doing it via renderers.
Ideally the layers would just hang off of renders, and not store their own x,y.
This would allow us to use LayoutState more of the time.

I'm not sure what the perf impact would be. One of the issues with
convertToLayerCoords() is that it's used to map to some ancestor at times when
you're not necessarily walking from the root, so you may not have all of the
state available.

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