Please checkout chart here.

https://plus.google.com/109956740682506252532/posts/1hKcYyPuJzh

[cut&pasted from g+]:
Hey  folks, i am currently writing a blog benchmarking akka vs traditional 
threading. I use the example provided by the akka java tutorial computing 
Pi. In order to compare the abillity to paralellize big amounts of tiny 
jobs, i use Pi-computaional slices of 100,000 jobs with iteration of 1000. 
Hardware is dual socket AMD opteron with each 8 real cores and 8 'virtual' 
(because the test uses floating point i just scale to 16 threads instead of 
32).

As you can see in the chart AKKA (2.03) performs very bad compared to 
threads and a homebrew actor lib.

source of akka bench is 
here: https://gist.github.com/RuedigerMoeller/8272966
(added outer loop to original typesafe sample)

Is there anything I miss or is this 'normal' Akka performance ?

Threading-style code is 
here: https://gist.github.com/RuedigerMoeller/8273307

I tried 2.1 with even worse results. 

http://imgur.com/TAt9XOf

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