Is a Go goroutine a coroutine?

Question

In the Google I/O 2012 presentation Go Concurrency Patterns, Rob Pike mentions that several goroutines can live in one thread. Does this imply that they are impleme

Answer 1

Goroutine is a separate "thread" of execution. It is IMO not really comparable to a coroutine. In the first approximation, goroutines can be implemented by real OS threads. AFAIK, that was the case of early versions of gccgo. Another difference is that goroutines can get preempted.

Current Go compilers implement goroutines as very lightweight, user space "threads". One distinct feature wrt to eg. green threads is that goroutines can get switched to different OS threads.

I think you can find some related bits of interest here: proc.c