It's not necessarily real time, you only experience time at the same rate, no matter how fast the universe is calculating in meta time. Or maybe time is a 4th s

It's not necessarily real time, you only experience time at the same rate, no matter how fast the universe is calculating in meta time. Or maybe time is a 4th spacial dimension, then the universe would be a finished, static thing, no more calculations needed (you would experience time in the sense that characters in a movie experience time, even though the film roll already contains all the frames)