Re: [Haskell-cafe] GHC, odd concurrency space leak

Am Mittwoch 14 April 2010 23:13:13 schrieb Gregory Collins:

Jesper Louis Andersen writes:

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This post describes some odd behaviour I have seen in GHC 6.12.1 when writing Combinatorrent. The post is literate Haskell so you can run it. The executive summary: A space leak occurs when a new process is spawned from inside another process - and I can't figure out why. I am asking for help on haskell-cafe.

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import Control.Monad.State

Does the problem go away if you use "Control.Monad.State.Strict"?

No. The problem goes away, however, if I replace p1 with p1 = forever $ liftIO (return () >> threadDelay 0) It is reduced, but still present, for p1 = forever $ liftIO (return () >> yield) It is also reduced by decreasing the delay in p2. I don't know what's going on, though.