rust/tests/pretty/tests-are-sorted.rs

// compile-flags: --crate-type=lib --test
// pretty-compare-only
// pretty-mode:expanded
// pp-exact:tests-are-sorted.pp

#[test]
fn m_test() {}

#[test]
fn z_test() {}

#[test]
fn a_test() {}
Sort tests at compile time, not at startup Recently, another Miri user was trying to run `cargo miri test` on the crate `iced-x86` with `--features=code_asm,mvex`. This configuration has a startup time of ~18 minutes. That's ~18 minutes before any tests even start to run. The fact that this crate has over 26,000 tests and Miri is slow makes a lot of code which is otherwise a bit sloppy but fine into a huge runtime issue. Sorting the tests when the test harness is created instead of at startup time knocks just under 4 minutes out of those ~18 minutes. I have ways to remove most of the rest of the startup time, but this change requires coordinating changes of both the compiler and libtest, so I'm sending it separately. 2022-07-26 21:40:48 +00:00			`// compile-flags: --crate-type=lib --test`
			`// pretty-compare-only`
			`// pretty-mode:expanded`
			`// pp-exact:tests-are-sorted.pp`

			`#[test]`
			`fn m_test() {}`

			`#[test]`
			`fn z_test() {}`

			`#[test]`
			`fn a_test() {}`