On 2/10/07, Donald Bruce Stewart
To everyone's surprise, GHC 6.6 beats GCC (3.3.5) here, at least the two test machines:
$ ghc -O -fexcess-precision -fbang-patterns -optc-O3 -optc-ffast-math -optc-mfpmath=sse -optc-msse2 A.hs -o a
$ time ./a 3.333333 ./a 0.96s user 0.01s system 99% cpu 0.969 total ^^^^^
Versus gcc 3.3.5:
$ gcc -O3 -ffast-math -mfpmath=sse -msse2 -std=c99 t.c -o c_loop $ time ./c_loop 3.333333 ./c_loop 1.01s user 0.01s system 97% cpu 1.046 total ^^^^^
There's no doubt that GHC is doing well here, but is that really a statistically significant difference? Certainly, it's great that GHC and GCC are doing at least about equally well, but I wouldn't conclude just from that data that GHC *beats* GCC. Cheers, Kirsten -- Kirsten Chevalier* chevalier@alum.wellesley.edu *Often in error, never in doubt "Ninety-nine percent of everything that is done in the world, good and bad, is done to pay a mortgage. The world would be a much better place if everyone rented." -- Christopher Buckley