Well, i found the reason why it did work with haskell and not with C. It was simply that for haskell i provided an arch via -optc-march=pentium3 and did not the same with C++ (... i should have read the sse option documentation). Thanks for the hint about strictness on large data structures. Regards, Andreas |---------+---------------------------> | | Michael Weber | | | | | | | | | 21.10.2003 12:55| | | | |---------+--------------------------->

-------------------------------------------------------------------------------------------------------------------| | | | An: Andreas.Schroeder@gillardon.de | | Kopie: | | Thema: Re: Faster, GHC, and floating point. | -------------------------------------------------------------------------------------------------------------------|

On Tue, Oct 21, 2003 at 12:03:34PM +0200, Andreas.Schroeder@gillardon.de wrote:

Can't tell you, SSE is disabled by cygwin when i try -mfpmath=sse i get

the

message

If you compare one language with SSE enabled and another one without, this is like comparing apples and oranges, no? It's rather meaningless when trying to decide how good Haskell performs compared to C++. And I have no doubt your C++ colleagues will point you to it... ;)

Oh, and btw, using MinGW yields the same message for C/C++. For haskell actually, it _makes_ a difference. Don't ask me why and how.

It would be good to find out what is going on there before comparing values. BTW: my personal experience is that with bigger datastructure it gets worse for Haskell rather than better. Closures and copying add a lot of overhead and you really have to keep on eye on strictness. Cheers, Michael