A computer only needs to compute things that are being observed... this has been known in video games since, forever
There is no reason for a video game to computer individual atoms, nor is there a reason for a simulation to compute individual atoms
What physical evidence do you have that we are in a simulation?
Does this count?
Delayed Choice Quantum Eraser Explainedhttps://m.youtube.com/watch?v=jRcrjKmsw2cEvidence at least that results are not computed/determined until they are observed.
Properties of objects at the quantum level are non-local, think quantum non-locality. There is no "spooky action at the distance", the problem is that we are familiar with properties at our classical level and we try to apply the same classical rules to the quantum level.
This guy explains very well the weirdness of Quantum Physics.
https://www.youtube.com/watch?v=q7v5NtV8v6Iand why the world might not be discrete (as many postulate):
https://www.youtube.com/watch?v=zNVQfWC_evg