I think the quantum eraser experiment is a strong indication that our universe is (lazy) computed.
A photon shot at double slit is a wave.
But only if you do not measure which slit was taken.
Or if you do measure: only if you destroy the measurement result.
I think the universe does lazy evaluation on which slit is taken.
If the result turns out to be 'not used' then the computation is skipped, and the light is approximated with a wave.
So not only is it a sim, the extra dimensional higher order entity running the sim cares about speed of computation.