Corrected, little bit slower on 64 bit but much faster on 32 bit version.
(also made hashmap grow from small default size as it is becnh req)
http://benchmarksgame.alioth.debian.org/u32q/program.php?test=knucleotide&lang=ghc&id=2
28 secs for 32 bit.
http://benchmarksgame.alioth.debian.org/u64q/program.php?test=knucleotide&lang=ghc&id=2
25 secs for  64 bit

Date: Thu, 28 Mar 2013 20:23:39 +0000
Subject: Re: [Haskell-cafe] my knucleotide fast on 64 bit but extremely slow on 32 bit?
From: dons00@gmail.com
To: bmaxa@hotmail.com
CC: haskell-cafe@haskell.org

Int64 is emulated on 32 bit. So it is not as efficient by a long shot.