It's interesting b/c my gut tells me if you knock a guy out and he's down unconscious then you should just wave it. But I believe the rule is you have to let them have a chance to wake up and recover until the 10 count is over. I think if someone is obv knocked out to the ref, then he can call it right there and then, no issue. But at the same time I've seen guys get ko'd cold. wake up, get up by 10 and keep going.
Fury/Wilder is a good example of that. A bad example is Donaire/Montiel where the dude looked like he had a seizure on the ground and Mora still allowed him to get back up only to get mauled for 2 secs and stopped again. That was a koty candidate that somehow the genius Russell Mora allowed to keep going for no reason. On the other hand, Fury in his own words was out until around 4 secs into the count and was somehow able to zombie himself up and survive the rd.
So basically, idk. If they're obv out then call it right there and then, if you're not sure, keep counting, I guess. Never get up later than 8 if you can help it, that's just asking for the ref to count you out.