[Haskell-cafe] A tale of three shootout entries

[Ryan Dickie]

Oops forgot to hit reply-to-all.. resending..

N-body is looking good. I am running and amd64 3000+ on ghc 6.8.1.  The
debian shootout is showing a huge gap between ghc 6.6 and g++ but I am not
seeing that gap.  One concern though is that the code doesn't look very
"haskellish". So much pointer manip.

For the nbody c++ code I am getting:
-0.169075164
-0.169031665

real    0m11.168s
user    0m10.891s
sys     0m0.043s

and for the nbody haskell code I am getting:
-0.169075164
-0.169031665

real    0m11.595s
user    0m11.422s
sys     0m0.044s


On Nov 26, 2007 8:21 PM, Don Stewart <dons at galois.com> wrote:

> s.clover:
> > In some spare time over the holidays I cooked up three shootout
> > entries, for Fasta, the Meteor Contest, and Reverse Complement. I
>
> Yay!
>
> > First up is the meteor-contest entry.
> >
> > http://shootout.alioth.debian.org/gp4/benchmark.php?
> > test=meteor&lang=ghc&id=5
> >
> > This is the clear win of the bunch, with significantly improved time
> > thanks to its translation of the better algorithm from Clean.
>
> Well done! Though looks like we'll have to follow the C++ implementation
> to be really competitive.
>
> > Next is reverse-complement.
> >
> > http://shootout.alioth.debian.org/gp4/benchmark.php ?
> > test=revcomp&lang=ghc&id=3
>
> Very good. I'm glad someone looked at that, since the old code was
> moderately naive (first bytestring effort).
>
> > Finally, there's fasta.
> >
> > http://shootout.alioth.debian.org/gp4/benchmark.php?
> > test=fasta&lang=ghc&id=2
>
> Yeah, we should do something better here. Hmm.
>
> > p.s. It looks like they've depreciated chameneos in favor of a new
> > version, chameneos-redux. As this was one of the places Haskell
> > really rocked the competition, it would probably be worth updating
>
> Definitely. I note also we're beating Erlang on the new thread-ring
> benchmark too,
>
>    http://shootout.alioth.debian.org/gp4/benchmark.php?test=threadring&lang=all
>
> > the Haskell entry for the new benchmark. Also, the n-bodies benchmark
> > seems like another that could be much improved.
>
> Yeah, that's a hard one.
>
> -- Don
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