[Haskell-cafe] Multi threaded garbage collector

Hi all, I did some experiments with concurrent Haskell, and unfortunately I couldn't get my code run faster when using more cores, actually it ran a bit slower. Now I noticed after profiling that about 70% of the time my program was performing garbage collection (I had lists of 50000 tiny objects that got recreated 100 times per second). If I understood it correctly, the current garbage collector of GHC is single threaded, which really hinders SMP Any plans on improving this or workarounds? Thanks, Peter