[Haskell-beginners] Speed performance problem on Windows?
orclev at gmail.com
Mon Mar 8 11:30:29 EST 2010
I'm sort of jumping into this conversation late, and I'm definitely a
Haskell newbie, but I have to wonder if the speed differences don't have
something to do with the C arguments passing conventions. I know there's
some rule that says if your first couple args are int's to pass them in the
CPU registers which might explain some of the speed boost for putting them
first. I need to go dig through my x86 reference manuals to get the exact
-R. Kyle Murphy
Curiosity was framed, Ignorance killed the cat.
On Sun, Mar 7, 2010 at 22:40, MAN <elviotoccalino at gmail.com> wrote:
> A little something I should have done before:
> Just compiled Don's C code (modified to my 32 bit laptop) with all
> flavors of precision. All the timings were similar:
> ~$ gcc bigmean.c -o bgC
> ~$ chmod +x bgC
> ~$ ./bgC 1000000000
> ~$ time ./bgC 1000000000
> real 0m8.585s
> user 0m8.553s
> sys 0m0.000s
> So the time's I've been getting are approximating C speed quite well.
> There's still the difference between recursive and fusion code that
> haven't been able to gap...
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> Beginners at haskell.org
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