http://bugs.winehq.org/show_bug.cgi?id=15925
--- Comment #39 from Nathan Ollerenshaw chrome@stupendous.net 2009-03-12 03:16:54 --- (In reply to comment #38)
I have no proof for this, maby just call it a gut feeling; I think the/one of the reason(s) for the bad performance people are reporting here is caused by wine+wow not using multiple threads correctly. It spawns them allright, (about 10-15 of them), but only 1 of the threads are at 50% usage, while the others are at 0-1%.
Considering that WoW is CPU-bound on anything but a very very bad gfx card, this is going to cause a MAJOR FPS problem, especially in crowded conditions where addons and stuff is hogging a lot of CPU time.
Something to keep an eye out for when bug 11674 is solved maby?
it seems that the conclusion of bug 11674 is that WoW does not multithread the rendering code. This has also been mentioned in the WoW official forums several times over the years; wow currently does not use multiple cores to the fullest extent.