[Haskell-cafe] Slow mvar when compiled with threaded

Branimir Maksimovic branimir.maksimovic at gmail.com
Wed Jan 8 03:01:29 UTC 2014

On 01/07/2014 09:39 PM, Bob Ippolito wrote:
> Here's a much simpler implementation for that sort of pattern, using 
> channels to fan out work to threads. I added a dependency on Criterion 
> because getCPUTime is basically useless for this kind of measurement 
> on Mac OS X since it doesn't include the time that the process spent 
> waiting on IO:
Great, thank you very much. You gave me material for learning ;)
However, my version is significantly faster when compiling without 
With -threaded option, your version is much faster than mine, but both 
are significantly slower
then compile without -threaded.


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