tmalloc in percona builds

I have seen some information online that the use of tmalloc can substantially increase mysql performance under some workloads:

http://mysqlha.blogspot.com/2009/01/double-sysbench-throughp ut-with_18.html

I can’t find any info on if tmalloc is incorporated into percona builds or if it’s even possible. Does anyone know more about this? Any help is appreciated.

Thanks,
-Aaron

bump

anyone know the answer to this?