On Wednesday 15 September 2010 12:22:24, Vo Minh Thu wrote:
Thanks all for your answsers. I still wonder why some people get very different results between gcc and ghc, and some others don't. A difference in processor?
Architecture (32/64-bit, x86/..., ...), processor, gcc version, OS, all play a role. Since ghc fares pretty well on 64-bit linux (David Terei and Don), both, via the NCG and via C, it seems its 64-bit code generator is better than its 32-bit code generator :( And judging from David's 32-bit Windows timings, GHC's 32-bit code generator is better adapted to Windows than to linux, but its generated C code is horrible for Windows.
I guess I will crank up a little package using criterion and producing two executables to make sure anyone who run the benchmark use the same options, and ease the whole process.
Thanks, Thu