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Is your RAM being the bottleneck by any chance?

On Wed, Oct 28, 2015 at 5:16 AM Joey Harrison <[log in to unmask]>
wrote:

> I'm experimenting with the -parallel flag and finding that using 2
> parallel threads is slower than a single thread, and using 3 is slower
> still. I have 4 cores on my machine, FYI.
>
> $ time java -jar HeatBugs.jar -for 10000 -repeat 4 -parallel 1 -quiet
>
> real 0m4.514s
> user 0m6.098s
> sys 0m0.749s
>
> $ time java -jar HeatBugs.jar -for 10000 -repeat 4 -parallel 2 -quiet
>
> real 0m4.799s
> user 0m12.019s
> sys 0m1.437s
>
> $ time java -jar HeatBugs.jar -for 10000 -repeat 4 -parallel 3 -quiet
>
> real 0m5.972s
> user 0m21.190s
> sys 0m2.933s
>
> What's the deal here?
>
> Joey
>