[webkit-reviews] review requested: [Bug 12833] REGRESSION: Selecting text in 6.6MB txt file is sluggish as of the Feb 19th nightly : [Attachment 13560] updated patch

[bugzilla-request-daemon at macosforge.org]

Antti Koivisto <koivisto at iki.fi> has asked  for review:
Bug 12833: REGRESSION: Selecting text in 6.6MB txt file is sluggish as of the
Feb 19th nightly
http://bugs.webkit.org/show_bug.cgi?id=12833

Attachment 13560: updated patch
http://bugs.webkit.org/attachment.cgi?id=13560&action=edit

------- Additional Comments from Antti Koivisto <koivisto at iki.fi>
- rename textBoxesCoverAllPositions() to textBoxesCoverAllPositionsInOrder()
- use textBoxesCoverAllPositionsInOrder() optimization in more places
- faster VisiblePosition construction
- fix issue pointed out by Mitz
- cleanups