Strange compilation behavior
simonpj at microsoft.com
Mon Dec 10 03:58:53 EST 2007
| 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
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