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A comment on Why you can have millions of goroutines but only thousands of Java threads. Parent comment

Re:Why you can have millions of goroutines but only thousand... by gpderetta on Tuesday October 09, 2018 @03:49AM (#18174043)
The 1:1 mapping is just an implementation detail of of current JVMs. Originally green threads (with an M:N scheduler) were used instead. IIRC they weren't even guaranteed to be preemptively scheduled, I don't know if this has changed since.

Technically os threads are also simply continuations.

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