On Fri, Dec 19, 2008 at 2:27 PM, Paul Keir <pk...@dcs.gla.ac.uk> wrote: > I'm seeing no performance increase with a simple coarse-grained > 2-thread code using Control.Concurrent. I compile with:
I didn't test your code, but [...] > fibs = 0 : 1 : zipWith (+) fibs (tail fibs) > heavytask m = putMVar m (fibs !! 100000) [...] probably fibs is being calculated only once, so just one thread calculates (fibs !! 100000) while others just keep waiting for the result. -- Felipe. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
