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Re:Go Creeping In by dboreham on Tuesday June 18, 2019 @10:28AM (#20213389)
It turns out to be hard to do concurrency in a library, if you need both absolute correctness (e.g. works with all system calls) and scale (more threads than the OS native threading will allow).

Afaik only Go and Erlang currently meet (at least my) criteria. No JVM solution currently does.

Re:Go Creeping In by apta on Tuesday June 18, 2019 @11:34AM (#20214227)
You have solutions like Akka, Vertx, and Reactor/RxJava on the JVM. Not to mention that the JVM is getting a green thread (fiber) implementation by means of project Loom.