[Haskell-beginners] Increasing capabilities dramatically increases execution time

[Thomas Koster]

> On 2016-01-22, Thomas Koster wrote:
> I have encountered a situation in a concurrent program where I see an
> unexpected, dramatic increase in execution time when I add additional
> capabilities. On a multi-core CPU, "-N1" is fastest by an order of
> magnitude and the program increasingly slows for an increasing number
> of capabilities (still fewer than the number of real cores, of
> course).
>
> <snip/>

On 27 January 2016 at 18:07, Elias Diem <lists at webconect.ch> wrote:
> Maybe post this to the café list at:
>
> https://mail.haskell.org/mailman/listinfo/haskell-cafe

Thanks, Elias. This is being discussed there in the thread "When are
MVars better than STM?".

https://mail.haskell.org/pipermail/haskell-cafe/2016-January/122785.html

--
Thomas Koster