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

15 Sep 2010

      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?

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

2010/9/15 Daniel Fischer :
...
On Wednesday 15 September 2010 02:50:15, David Terei wrote:
...
On 13 September 2010 20:41, Vo Minh Thu  wrote:
...
... the post is from 2008. No LLVM goodness. So I thought GHC 6.12.1
(not the latest and greatest HEAD) would be enough.
I compiled the two programs myself out of curiosity and got the
following times.
Linux, 64bit, Ubuntu 10.10:
1e8
clang: 0.180s
gcc: 0.179s
ghc 6.12.1 (viac): 0.187s
ghc 6.12.1 (fasm): 0.218s
ghc HEAD (viac): 0.186s
ghc HEAD (fasm): 0.179s
ghc HEAD (llvm): 0.174s
1e9
clang: 1.657s
gcc: 1.647s
ghc 6.12.1 (viac): 1.653s
ghc 6.12.1 (fasm): 1.975s
ghc HEAD (viac): 1.648s
ghc HEAD (fasm): 1.658s
ghc HEAD (llvm): 1.646s
So basically all have the same time except ghc 6.12.1 where fasm is a
little slow.
On windows xp 32bit I get quite different results which I trust less
as the times are jumping around much more then they were on linux:
1e8
gcc: 0.365s
ghc 6.12.1 (viac): 5.287s
ghc 6.12.1 (fasm): 1.332s
ghc HEAD (viac): 5.292s
ghc HEAD (fasm): 0.875s
ghc HEAD (llvm): 0.359s
Not sure why the results on windows are so different.
I have no idea why, but I remember that on several occasions timings for
via-C compiled programmes on Windows have been abysmal.
Whether it's a general Windows/gcc mismatch or something GHC-specific, I've
no idea (and can't find out, not having Windows).
For what it's worth, the approximate timings on my 32-bit linux (openSUSE
11.1) box have been
1e8
gcc: ~0.4s
6.12.3 (viac): ~1.2s
6.12.3 (fasm): ~2.7s
HEAD the same as 6.12.3
(I have deleted the programmes and I don't remember the exact timings, if
you're interested, I could reconstruct them).
...
If anyone else
wants to run the two programs on Windows and check that would be
great.
Cheers,
David