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by peoplewindow 3268 days ago
Nashorn isn't that slow, but there's another JS-on-the-JVM project called Graal.js which is about as fast as NodeJS/V8.

One reason Nashorn isn't used that much is that it doesn't expose a node.js compatible API. JS people often want Node specifically, not just the ability to run JS. It has some cool features though. The shell mode is neat.