[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 #29 from James Robinson <jamesr at chromium.org>  2010-03-04 14:29:07 PST ---
Here are the exact speedups from this patch and r55065 for the
position:relative test page.

Speedups:

r55064->r55065 without this patch, 1.75x faster
r55064 with this patch is 2.78x faster
r55065 with this patch is 2.12x faster

Measured times (from my MBP):
r55064, no patch:
1180ms

r55064, with patch:
425ms

r55065, no patch:
675ms

r55065, with patch:
318ms

Combined, this patch and r55065 speeds up the position:relative test page by
3.71x.

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