[Haskell-cafe] Sparks created, but not used (par/pseq, ST monad)

[Michael Lesniak]

Hello Daniel,

>> and running with
>>
>>     ./st +RTS -N -s
> You'd need to give a number of capacities, I think (-N2 e.g.).
The runtime option -N chooses the maximum number of cores,  according
to GHC's documentation.


> I think with the strict ST monad, when you have
>    a <- f n1
>    b <- f n2
> they are already evaluated, so there's no point in sparking evaluation in
> parallel.
Very good point and probably the reason for my problems, thanks!


Cheers,
  Michael


-- 
Dipl.-Inf. Michael C. Lesniak
University of Kassel
Programming Languages / Methodologies Research Group
Department of Computer Science and Electrical Engineering

Wilhelmshöher Allee 73
34121 Kassel

Phone: +49-(0)561-804-6269