Folks, It looks like I successfully squashed my time leaks and moving my serialization to Ptr Word8 got me as close to the metal as possible. I'm still getting wierd results, though, and they look like a time leak. ORANGE ALERT: 0s, 6s, SrvServerInfo ORANGE ALERT: 0s, 8s, SrvServerInfo ORANGE ALERT: 0s, 9s, SrvServerInfo ORANGE ALERT: 0s, 9s, SrvServerInfo ORANGE ALERT: 0s, 7s, SrvServerInfo unstuff :: Ptr Word8 -> Int -> IO Command unstuff ptr ix = do TOD time1 _ <- getClockTime (kind, ix1) <- unpickle puCmdType ptr ix TOD time2 _ <- getClockTime (cmd', _) <- unpickle (puCommand kind) ptr ix1 TOD time3 _ <- getClockTime when (time3 - time1 > 3) $ -- fail here with the messages above I would like to know where the time is going but how do I troubleshoot something like this? My understanding is that regular profiling will give me the total time spent by cost-center so if I add cost-center annotations it will not give me the average time per run. Come to think about it, the profiling report gives me the # of entries and the total time so I can get the average. Any other suggestions on how to figure out what is going on here? Thanks, Joel -- http://wagerlabs.com/