[Haskell-cafe] Progress on shootout entries

Sebastian Sylvan sebastian.sylvan at gmail.com
Tue Jan 3 17:01:34 EST 2006

On 1/3/06, Chris Kuklewicz <haskell at list.mightyreason.com> wrote:
> Hello,
>   Where there were no entries to the
> http://shootout.alioth.debian.org/benchmark.php?test=chameneos&lang=all
> benchmark, there are now two.  The one by Josh Goldfoot is already
> posted, the one Einar Karttunen and I optimized has been submitted and
> will run faster/smaller.  Our code is at
> http://haskell.org/hawiki/ChameneosEntry
>   Now for improving the fasta benchmark,
> http://shootout.alioth.debian.org/benchmark.php?test=fasta&lang=all ,
> which currently has a space leak in the Haskell entry.
>   A non-leaking version which has been optimized to run 3.5 times faster
> is now up at http://haskell.org/hawiki/FastaEntra (ooops..my spelling
> mistake).
>   It could still be made to run about 3 times faster, if the other
> languages are any guide.  Anyone want to help polish this one?
>  Also, two other existing entries have space leaks, as can be seen at
> http://shootout.alioth.debian.org/benchmark.php?test=all&lang=ghc&lang2=ghc
>  And finially, the haskel entry for
> http://shootout.alioth.debian.org/benchmark.php?test=fannkuch&lang=all
>  is currently the *slowest* entry out of 28 languages.  It is 813x
> slower than the c-code, 500x slower than OCaml.  Should be easy to make
> it faster...

While the implementation is far from "nice" it still finishes with N=9
(which, AFAICT, is what the benchmark is run with) in a fraction of a
second on my machine (and not anywhere near 51s as in the
benchmark)... I have a 2.6 Ghz P4...

I was going to rewrite it using mutable STArrays for a pure version
that's still fast but i sorta feel like I lost the motivation now that
it turns out the existing implementation, though ugly, performs
somewhat okay...

Sebastian Sylvan
UIN: 44640862

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