On Wednesday 07 September 2011, 01:01:08, Travis Erdman wrote: > The performance of mapM appears to be supralinear in the length of the > list it is mapping on. Hmm. Could reproduce with 6.12.3 and 7.0.4, but not with 7.2.1. > Does it need to be this way? Apparently it doesn't, and it seems to be fixed now.