10 Dec
2007
10 Dec
'07
3:58 a.m.
| I'm using ghc 6.6.1 under Ubuntu Gutsy on a Pentium 4 machine, and I | was working to get some code running in an acceptable time. I was | surprised to find that turning on profiling switches made the code run | over 40x faster! That is indeed strange. Things to try: * Try without -O. * Try with -O -fno-full-laziness. * Add -dcore-lint (no perf effect, but does internal checks) * Try with 6.8.1 Simon