Who says the computation has to run inside of time?
Consider our spacetime as a four-dimensional space, the pixels of which are set by a computation running in a different dimension of "time." The number of steps required to generate the final output is arbitrary and unrelated to anything we observe, and there's no contradiction in supposing that, say, information in our future could be an input to an iterated algorithm that determines our present.
Consider our spacetime as a four-dimensional space, the pixels of which are set by a computation running in a different dimension of "time." The number of steps required to generate the final output is arbitrary and unrelated to anything we observe, and there's no contradiction in supposing that, say, information in our future could be an input to an iterated algorithm that determines our present.