http://bugs.winehq.org/show_bug.cgi?id=22033
--- Comment #27 from Matt Lewandowsky matt@greenviolet.net 2010-05-06 18:40:47 --- (In reply to comment #26) mapmalloc may be a performance hog, but so far my testing is indicating that:
1) "It works."
2) It's available as a core piece of Solaris (even before 9, which is the oldest version anyone should even think of using Wine on...).
jemalloc doesn't meet #2, which is kind of important. And I'm seeing various issues with concurrent allocations, which mapmalloc does not support (and therefore works across the board so far). Also, if jemalloc was argued as Wine's default allocator, it would not likely be usable for Wine on OS X, according to various comments in the sources.
My testing is ongoing. This is just a summary for the bug's sake of ongoing conversations on IRC.