On Sat, Feb 2, 2013 at 3:19 PM, Nick Rudnick <nick.rudn...@gmail.com> wrote: > Roughly, I would say the differences in runtime can reach a factor as much > as 1:10 at many times -- and so I am curious whether this subject has > already been observed or even better discussed elsewhere. I have spoken to > somebody, and our only plausible conclusion was that software like web > browsers is able to somewhat aggressively claim system resources higher in > the privilege hierarchy (cache?? register??), so that they are not available > to other programs any more.
Maybe the Haskell program requires a lot of disk IO? That could easily lead to a big performance change since disk is so slow compared to everything else these days. You could try looking with 'lsof' to see if the browser has a ton of files open or try running the Haskell program with higher or lower disk IO priority via 'ionice'. -- gwern http://www.gwern.net _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe