https://bugs.winehq.org/show_bug.cgi?id=34166
--- Comment #47 from Ken Thomases ken@codeweavers.com --- Comment 24 was about the hack in attachment 47639/attachment 52485. That hack disables OS X's full-screen optimizations, which is how it sidesteps the bug in those optimizations.
The hack in attachment 47352 is a completely different approach and should not affect performance.