ketil+haskell at ii.uib.no
Thu Oct 19 03:05:48 EDT 2006
"Neil Mitchell" <ndmitchell at gmail.com> writes:
> I want to benchmark GHC vs some other Haskell compilers, what flags
> should I use?
> [...] I guess the answer is "-O2 -fvia-C"?
I tend to use -O2, but haven't really tested it against plain -O.
>From what I've seen -fvia-C is sometimes faster, sometimes slower, I
tend to cross my fingers and hope the compiler uses sensible defaults
on the current architecture.
One thing that IME makes a difference is -funbox-strict-fields. It's
probably better to use pragmas for this, though. Another thing to
consider is garbage collection RTS flags, those can sometimes make a
If I haven't seen further, it is by standing in the footprints of giants
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