(Repeated) performance

Each performance is often unique for the audience, but for the performers themselves, it is not only practiced many times, but the performance itself, is also often repeated over and over. Of course, audience reaction would still be different each time, and of course precisely because of the efforts needed to put up a good show that it is unlikely and would be wasteful if one show is only performed once, but do they sometimes get tired of the repetition? Or the audience, those who watch multiple times, do they get tired of the repetition or actually it is precisely the repetition (predictability) that is part of the attraction?

Also think about the speeches one gives, at public events or graduations.