when did goroutine switch

endless_for.go

Goroutine didn't release OS threads and couldn't switch to other goroutine.

The programming print out the count of id: equal runtime.GOMAXPROCS(0).

release_by_sleep.go

Release by time.Sleep().

The code will print out all id: .

release_by_gosched.go

Release by runtime.Gosched()

The code will print out all id: .