Python PyPy interpreter in Javascript: Firefox beats CPython beats Chrome!

Ryan Kelly posted info on PyPy.js an implementation of Python written in Javascript. available here. 

I tried it on Chrome Version 34.0.1847.131 m (the latest). using the pystone benchmark:

In cPython 3.4.0b1  I got:

And in Firefox 29.0 I got:

These were the latest versions at the time of writing (I think) and taking the fastest of their four runs on the same machine gives:

Platform	Best of 4 Pystone	Multiplier
Chrome	14013.5	100%
cPython	37424.7	267%
Firefox	66934.4	478%

See the original article for caveats on the state of PyPy.js - it may only run pystone for all I know.

Of course it doesn't say much about Python speed but it may say something about Chrome vs Firefox speed? Who knows - lies, damned lies, and statistics!