Hopefully this can actually decrease overhead. Go's garbage collector has some short STW pauses that require stopping the world. It you have one thread misbehav

Hopefully this can actually decrease overhead. Go's garbage collector has some short STW pauses that require stopping the world. It you have one thread misbehaving by running a tight loop right now, the rest of the threads will sit there spinning until that one thread reaches a preemption point. With explicit preemption, that period would be much shorter.