Try to improve build times

[mre]

Based on https://corrode.dev/blog/tips-for-faster-rust-compile-times/

[mre]

Results:

• First run: 3m 29s
• Second run: 1m 54s
• Third run: 1m 42s

Pretty good! Cached builds haven't been below 2 minutes in a while and are typically hovering around 3m 30s, so I call this an improvement, although I did not run exhaustive tests.

[MarcoIeni]

it seems that rust-cache automatically set CARGO_INCREMENTAL.
From the readme:

[mre]

Oh, I did not know that. Thanks for sharing!
Couldn't harm to explicitly add it, just in case we move to a different caching solution in the future (even though I doubt that will happen anytime soon; rust-cache is pretty awesome).

[MarcoIeni]

yeah, I just wanted to share this :)
Great article btw :)
I didn't know about cargo-features-manager