http://bugs.winehq.org/show_bug.cgi?id=24204
--- Comment #9 from Aric Stewart aric@codeweavers.com 2012-01-30 07:33:01 CST --- There where actually a number of issues revealed by this bug.
I have submitted a set of 5 patches that fully resolves this and all bugs relating to having a very long unbroken string causing slowdowns.
The given file still takes about 20 seconds on my machine to open, but it it is much better than several minutes as it was taking before.
Other test files, such as the one from Bug 26638 now only take a few seconds.