Go automatically multiplexes goroutines on top of OS threads. You can peg all the cores of a multicore CPU in a single Go program using goroutines. Edit: last

Go automatically multiplexes goroutines on top of OS threads. You can peg all the cores of a multicore CPU in a single Go program using goroutines. Edit: last I looked you could see how many OS threads would be used by looking at runtime.GOMAXPROCS. There was a time when it would just default to 1, but it looks like they changed it. When I last programmed in Go you had to override it via an environment variable or set it in code.