So I had to learn Python

Daestrum said:

True, plus I did the start / end time inside the b4j app.
Mine ran on i5 3.2Ghz 8GB ram java9 (lib compiled against java 8-121)

As an aside but sort of related - I have jRuby running too now.

Click to expand...

That will make a big difference (measuring time in b4j) because the b4j app needs to load the script somehow.
Mine ran on a Xeon E5-2650 2GHz 250GB of RAM, but it sounds like both our processes were not machine limited so maybe its not a problem.