On Sun, Dec 2, 2012 at 3:12 PM, Branimir Maksimovic <bmaxa@hotmail.com> wrote:
Well, playing with Haskell I have literally trasnlated my c++ program 
http://shootout.alioth.debian.org/u64q/program.php?test=fannkuchredux&lang=gpp&id=3
and got decent performance but not that good in comparison
with c++ 
On my machine Haskell runs 52 secs while c++ 30 secs.

Did you compile with -O2 -fllvm?

On my machine:

C++ 28 sec
Mine -O2 -fllvm 37 sec
Yours -O2 -fllvm 41 sec
Mine -O2 48 sec
Yours -O2 54 sec

My version of your Haskell code is here: http://hpaste.org/78705