Re: [Haskell-cafe] How to improve speed? (MersenneTwister is several times slower than C version)

Hello isto, Thursday, November 2, 2006, 1:16:55 AM, you wrote:

I have tried to do different things but now I'm stuck. unsafeRead and unsafeWrite improved a bit the lazy (STUArray-version) and

why you think it's a lazy? :) ST monad is just the same as IO monad internally, only types are different (there is also Lazy.ST monad - this is really lazy) 10-20 times difference is typical for GHC programs. i think that better results are observed only when C version is really bound by memory speed (that is rather typical situation) use JHC if you need to generate really fast code. or use ocaml/clean -- Best regards, Bulat mailto:Bulat.Ziganshin@gmail.com