[Webkit-unassigned] [Bug 13487] Implement O(1) absoluteClippedOverflowRect and absoluteOutlineBox during layout for a possible speed gain

[bugzilla-daemon at webkit.org]

http://bugs.webkit.org/show_bug.cgi?id=13487





------- Comment #3 from mitz at webkit.org  2007-04-25 11:54 PDT -------
(In reply to comment #2)
> Dave, can you check this with the nesting PLT?
> 

Hyatt mentioned on IRC a page that was "getting pwned by absolutePosition" and
that computeAbsoluteRepaintRect was the "top offender for deeply nested
inlines" (after applying some of his optimizations).

I suppose it was in reference to non-cached pages, where image loading causes a
ton of incremental relayout. In fact, for initial layout this patch may turn
out to be bad, since it pushes state even if !checkForRepaint. Perhaps that can
be avoided.


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