http://bugs.winehq.org/show_bug.cgi?id=12949
--- Comment #6 from Florian mcflow-forum@gmx.net 2008-05-15 10:27:15 --- (In reply to comment #5)
Confirming, it's really slow (c2q 6600, gf 8800 gts, no compiz or compositing), even with lowest graphics settings. Stefand an me discussed about, it occurs probably because graphics driver falls back to software shader processing, because we're generating too complex shaders. As you can see the game is pretty fast when you are walking with Altair (the main character) on the screen, when the game is loading.
Can this be related to bug #10631? I experienced a very similar issue with another game, too.