[Haskell-cafe] Re: Optimizing spelling correction program

[Kamil Dworakowski]

On Jun 23, 9:35 am, Bulat Ziganshin <bulat.zigans... at gmail.com> wrote:
> Hello Kamil,
>
> Tuesday, June 23, 2009, 11:17:43 AM, you wrote:
>
> >> One easy way to fix the GC time is to increase the default heap size.
>
> >>  ./a.out +RTS -A200M
> > It does make the GC only 1.4% of run time but it  increases it overall
> > by 14s.
>
> not surprising - you lose L2 cache locality. try to use -A size that
> is equal to your L2 cache size

I have a dual core with 3M L2 cache, but setting this value to anyting
more than 1M slows down the program.