[nopassrecover]

It doesn’t - Special / General Relativity demonstrates gravitational time dilation.

[trypt]

So you mean our simulation doesn't bother calculating the state of empty areas on which there are few or no other dependent states which depend in a statistically significant way upon that empty state?

[TheOtherHobbes]

Not just gravitational. The stress energy tensor includes an energy term. Hot things warp spacetime too.