My CPU is from 2012. What on earth is he doing this on, a TI-83? Or am I missing some intricacy of whatever Gentoo is doing that would inherently inflate build times by an order of magnitude?
That's weird, cargo displays the current crates under compilation, not files as that's not the compilation unit in Rust, the author seems to be fibbing.
$ emerge -v starship
<...>
Running `rustc --crate-name starship --edition=2021 src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib <etc>
Running `rustc --crate-name starship --edition=2021 src/main.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type bin <etc>
Just want to say, creating a release build is really unusual! You'd do that relatively rarely. Most of the time you'd create a debug build, which took 29.56 seconds on my machine for a clean build and 1.45 seconds for an incremental build with one line changed.
I sympathise with the author's running on underpowered hardware, but it might not reflect the experience of the average Rust developer.
Then again, I'm fairly sure I have starship installed via `cargo install`, not via portage (Gentoo's packaging system).
I'm a Rust and Gentoo lover :D