http://bugs.winehq.org/show_bug.cgi?id=11364
--- Comment #6 from Dmitry Timoshkov dmitry@codeweavers.com 2008-03-17 21:48:53 --- I downloaded WinRAR 3.71 and tested it on my Core2 Duo (2 cores) laptop. The CPU usage is very similar under Ubuntu 7.04 64-bit and Vista 64-bit: RAR doesn't use 100% on both cores in either case, maximum I see is about 80%.
Artem, what RAR version are you using, what results do you get, and under what OSes?