Goroutines are cooperatively scheduled. Does that mean that goroutines that don't yield execution will cause goroutines to run one by one?

Question

From: http://blog.nindalf.com/how-goroutines-work/

As the goroutines are scheduled cooperatively, a goroutine that loops continuously can starve other

Answer 1

@Akavall Try adding sleep after creating dumb goroutine, goruntime never executes sum_up goroutines.

From that it looks like go runtime spawns next go routines immediately, it might execute sum_up goroutine until go runtime schedules dumb() goroutine to run. Once dumb() is scheduled to run then go runtime won't schedule sum_up goroutines to run, as dumb runs for{}