[CharlesW]

It depends on your definition of "low-memory". The Kinoma XS JavaScript ES6 runtime[1] is designed specifically for low memory/CPU limited embedded devices, and runs very comfortably on 200 MHz ARM devices with 512 KB RAM.

[1] http://kinoma.com/develop/documentation/technotes/introducin...

[titzer]

Looks like that is ES5 only.

[CharlesW]

It currently scores 96.8% on the ES6 Compatibility Table hosted by kangax[1], which is pretty good. That's native, no polyfills or transpiler.

EDIT: Kinoma claims ES6 compatibility is at 98% as of 2016-01-02.[2]

[1] https://kangax.github.io/compat-table/es6/ [2] http://www.kinoma.com/develop/documentation/js6/