Re: [Haskell-beginners] Increasing capabilities dramatically increases execution time

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).

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On 27 January 2016 at 18:07, Elias Diem 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