[seabrookmx]

> Two Java/whatever greenthreads atop a single OS thread cannot run in parallel

Well.. yes. Actually that makes sense!

I guess I just never thought of them as green threads in JS because you don't interact with them as an object like you can in other languages.

[hot_gril]

"Greenthreading" is a weird term because it often refers to a very old Java implementation that was removed in 2000. And the Wikipedia article on the term is plain wrong in some ways.