[jerven]

Or GRAAL.js which is a lot further in implementing al the new ES6+ features than Nashorn will ever be [1]

It's really quite nice and I think there will be exiting news in this front from Oracle lab soonish...

[1] http://www.oracle.com/technetwork/oracle-labs/program-langua...

[pjmlp]

I love Graal, have been following its development since it used to be called Maxime VM.