The game’s benchmark is completely useless. It is streaming assets constantly at a rate that is no way similar to actual gameplay. The only thing it’s doing is basically measuring your hardware’s performance; useful if you’re a review site comparing hardware, useless if you have a game you want to play and you’re trying to reduce stutter.
If you want a repeatable test that’s more inline with actual gameplay, you might want to use one of the game’s cutscenes.