Sure. In an empty project, I saw around 0.7s compile times. This is ideal. But I kept developing and added around 300 lines of code and a few (3?) dependencies

Sure. In an empty project, I saw around 0.7s compile times. This is ideal. But I kept developing and added around 300 lines of code and a few (3?) dependencies to my cargo.toml, and I was seeing compilation times that were exceeding 10 seconds to, say, add a dbg! message. 10 seconds is basically as slow as I'd accept. I wouldn't love it, but I'd suffer through it if I had to. But what I really didn't like was that my feeling was it wasn't the bottom - adding more deps or more lines of code looked like it would continue to increase the time without bounds. I like doing a lot of game dev and graphical work, and it often requires really rapid iteration to test small changes. (How fast should the AI walk? Should he turn around at this point? Does this logic "feel right" like this, or do I need to trigger it conditionally?)