[Webkit-unassigned] [Bug 65277] Provide flexible (in terms of position relative to space) logical word breaker to improve performance of --webkit-visual-word

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=65277





--- Comment #25 from Van Lam <vanlam at google.com>  2011-08-15 11:46:58 PST ---
Clarification on the patch:

The overall performance speedup is 0.8% (going left and right) when running in DRT; about 7.5% is spent in visual word movement code. From within visual word movement code, however, this is about a 10% speedup; this might be improved to 15-20% if we more aggressively utilize this API within rightWordBoundary and leftWordBoundary.

A secondary (probably more significant) purpose of this patch is that it will make future work much simpler to implement, most directly the Mac/Linux version (https://bugs.webkit.org/show_bug.cgi?id=65773). I've implemented a working Mac/Linux version but did not submit it for review just because it is not very understandable. I think with this change it would be much easier to implement and maintain.

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