http://bugs.winehq.org/show_bug.cgi?id=24558
--- Comment #14 from Ema ema.oriani@gmail.com 2011-06-05 03:54:37 CDT --- To add a bit more colour, one can fix this behaviour by setting the affinity of Starcraft II(i.e. on which processors/cores all the process' threads run) to force all the threads to run on one and one only core. This way that very core will be implicitly used to 100% and the game will run fast.
Cheers,