Daniel Fischer wrote:
What perpetually puzzles me is that in C long long int has very good performance, *much* faster than gmp, in Haskell, on my computer, Int64 is hardly faster than Integer.
I tried the example with Int64 and Integer. The integer version was actually quicker ... which is the reason I decided to post the results. C++ version times: 1.125; 1.109; 1.125 Int32 cpu times: 3.203; 3.172; 3.172 Int64 cpu times: 11.734; 11.797; 11.844 Integer cpu times: 9.609; 9.609; 9.500 Interesting that Int64 is *slower* than Integer. On the other side the C version is not that much quicker. I guess the Haskell version is using generic versions of mod and sum (since they are from a library) which would mean indirect calls. The Haskell version probably also creates the list nodes ... even when they get almost immediately garbage collected. Thanks for pointing out Int64 sucks so much :) Peter. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
