su, 2006-11-26 kello 15:12 +1100, Ivan Tomac kirjoitti: > The first version I came up with ran 20 times slower than C. > Thanks to Don Stewart's suggestions on IRC, I managed to improve the > ...
> Options used to compile the version using the hash function written > in Haskell: > ghc -O -funbox-strict-fields -fglasgow-exts -fbang-patterns -cpp -o > test hashByteString.hs test.hs > > Options used to compile the version using the hash function in C: > ghc -O -fglasgow-exts -ffi -fbang-patterns -cpp -DCHASH -o ctest > ctest.c test.hs Hi Ivan Tomac, Have you tried -O3 -optc-O3 -funfolding-use-threshold=16 compile flags? Don, Lemmih, Lennart and Bulat helped me to sort out a similar problem a couple of weeks ago. More hints can be found at http://haskell.org/haskellwiki/Performance/GHC Especially, to check generated code by taking a look of core -ddump-simpl > core.txt and to check memory leaks, you could run with +RTS -sstderr br, Isto _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe