Re: [Haskell-cafe] benchmarking c/c++ and haskell

On Monday 13 September 2010 11:50:14, Vo Minh Thu wrote:

2010/9/13 David Virebayre :

...

Does it help to compile with ghc --make -O2 -funbox-strict-fields  ??

No, it doesn't. Can I assume you don't have the problem I described?

Currently, GHC's native code generator is not too good at optimising loops. It might help if you compile via C, ghc -O2 -fexcess-precision -fvia-C -optc-O3 On my box, that gives a > 2× speedup (unfortunately, that means it takes almost three times as long as the C version instead of > 6×). If you have the llvm backend for GHC, that is supposedly better for such code.

Thanks, Thu