Haskell is by far faster on a single core but does not scale as well across mult...

vegai · on Sept 13, 2008

It will soon, though. See http://hackage.haskell.org/trac/ghc/wiki/Status/Releases and "Parallel garbage collection".

A release candidate of ghc 6.10 should be out in a few weeks.

None of this would help Joel, I suppose, since he decided to move away from Haskell to Erlang for other reasons.

gregwebs · on Sept 14, 2008

The new gc will be an improvement but is is till not as good as Erlang's garbage collection, which is per process.