[Bug 30627] Appending text to a large richedit is very slow

http://bugs.winehq.org/show_bug.cgi?id=30627

--- Comment #7 from Dan Kegel <dank(a)kegel.com> 2012-05-10 14:19:44 CDT ---
Created attachment 40112
  --> http://bugs.winehq.org/attachment.cgi?id=40112
Kludge global flag optimization patch

The attached kludge patch adds a global bNeedWrap flag
sufficient to pass the test suite.
With this and my previous patch, appending 1k lines at 40k now takes
14700 ms, only about 3x native.

It's not enough at 400k, though; that's still 88800 ms, 11x slower than native.

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