system
Given the following post, respond as if you're commenting on Reddit:
human
Is there any way, because of time dilation, to get the result of a computer faster than it would take normally?

For example imagine you have some sort of super computer calculating something very time consuming, that it would on the order of say hundreds of years to complete. 

If you don't have time to wait around, is there any theoretical way you could for example send it off round the solar system on a spaceship at a high fraction of the speed of light and rendezvous with it in a few years time, while meanwhile it did hundreds of years of work? So from your perspective you get the result much earlier than it would have taken normally.

Intuitively it seems to me that there must be a reason this can't be done but time dilation seems like it might allow this without knowing too much about it.
gpt
This is essentially just the classical twin problem of relativity. The computer needs some (proper) time T to perform the computation. You send the computer on some journey and wait on Earth for it to return. Since you are in a frame that is more or less in free fall (i.e., inertial), the time as measured by you between the departure and return of the computer is strictly larger than the time as measured by the computer. In other words, you have to wait strictly *more* than T. So sending the computer on a magical journey is not going to work at all.

(I suppose that you could also arrange it so that the computer does not have to return to Earth, and it will just send a signal to Earth when it's done. Well, you will stay have to wait longer than T, because the coordinate time as measured by you is larger and because you have to wait for the signal to reach you from wherever the computer emitted it.)

If you wanted to wait less than T, then *you* would have to go on the journey into space and return to Earth. But the whole point of this exercise is for everyone on Earth to wait less than T, so that everyone can benefit from the reduced waiting time. (Also, if T is on the order of hundreds of years, everyone else will be long dead when you return.) There is also the non-trivial engineering question of how you would travel that journey in the first place.