Why Ruby isn't slow (opens in new tab)

Well, RPython, which is not quite the same thing. And aside from the lack of benchmarks, http://docs.topazruby.com/en/latest/current-status/ says it's "extremely incomplete" which is generally where "fast Ruby" implementations exist.

The Benchmarks from Oracle on One VM to Rule it All has Topaz Numbers there.

Basically MRI <JRuby <Topaz <New Oracle SVM,

And the above line has roughly 20 - 50 times performance difference in benchmarks.