Investigate the performance cost of having wrong uids

[Sunshine-dev-forever]

Overview

Right now godot uses uids to identify other objects to import into scene. There uids are unfortunately computer-specifc, and so need to be remade every time this project is cloned locally.

If the uid is incorrect, then a filepath fallback is used.

problem

One of the times I cloned this project locally, it ran unusually slow. After the uids were rebuilt, the project was noticeably faster. I did not do a proper test, so something else may have happened, but this is still worth a look.

Testing

I imagine you could just manually edit all the uids in scene to be wrong and see if it runs slower