http://bugs.winehq.org/show_bug.cgi?id=10860
--- Comment #9 from diafero@arcor.de 2009-06-14 06:20:00 --- I just checked for this bug again and found out that obviously, my assumption of this being caused by the software emulation is wrong. I found an age (as worlds are called in this game) where the software emulation message does not appear (after changing the sources to show the message all the times and not only the first time), and the high CPU load remains. So the slowness and the system load is obviously called by something else.
I am now using KDE4 and noticed a huge performance difference depending on composite: With it enabled, the game runs noticeably slower than with composite disabled. The X server CPU load goes almost back to zero when composite is disabled and I just leave the game running (with the game still running at 100% = one of my two cores). With composite enabled, the X server adds some 10-50% CPU load more.