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

//@ compile-flags: --crate-type=lib --test --remap-path-prefix={{src-base}}/=/the/src/ --remap-path-prefix={{src-base}}\=/the/src/
//@ pretty-compare-only
//@ pretty-mode:expanded
//@ pp-exact:tests-are-sorted.pp

#[test]
fn m_test() {}

#[test]
#[ignore = "not yet implemented"]
fn z_test() {}

#[test]
fn a_test() {}
Implementing "<test_binary> --list --format json" #107307 #49359 2023-02-08 10:41:28 +08:00			`//@ compile-flags: --crate-type=lib --test --remap-path-prefix={{src-base}}/=/the/src/ --remap-path-prefix={{src-base}}\=/the/src/`
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. 2022-07-27 05:40:48 +08:00			`//@ pretty-compare-only`
			`//@ pretty-mode:expanded`
			`//@ pp-exact:tests-are-sorted.pp`

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

			`#[test]`
Implementing "<test_binary> --list --format json" #107307 #49359 2023-02-08 10:41:28 +08:00			`#[ignore = "not yet implemented"]`
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. 2022-07-27 05:40:48 +08:00			`fn z_test() {}`

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