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| author | Dylan DPC <99973273+Dylan-DPC@users.noreply.github.com> | 2022-10-30 11:50:27 +0530 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2022-10-30 11:50:27 +0530 |
| commit | 176a89f4969904bccb280e6b36fdd6eb878a88f2 (patch) | |
| tree | 984c8ac38b67860ee8912bcaac02eb6aa56791db /compiler/rustc_codegen_llvm/src | |
| parent | 8564ee89001629aecd544814a2e549614996f603 (diff) | |
| parent | 17b86cb6116ab25d5fdd9ec406738ad0720c702c (diff) | |
| download | rust-176a89f4969904bccb280e6b36fdd6eb878a88f2.tar.gz rust-176a89f4969904bccb280e6b36fdd6eb878a88f2.zip | |
Rollup merge of #103689 - saethlin:libtest-startup, r=thomcc
Do fewer passes and generally be more efficient when filtering tests Follow-on of the work I started with this PR: https://github.com/rust-lang/rust/pull/99939 Basically, the startup code for libtest is really inefficient, but that's not usually a problem because it is distributed in release and workloads are small. But under Miri which can be 100x slower than a debug build, these inefficiencies explode. Most of the diff here is making test filtering single-pass. There are a few other small optimizations as well, but they are more straightforward. With this PR, the startup time of the `iced` tests with `--features=code_asm,mvex` drops from 17 to 2 minutes (I think Miri has gotten slower under this workload since #99939). The easiest way to try this out is to set `MIRI_LIB_SRC` to a checkout of this branch when running `cargo +nightly miri test --features=code_asm,mvex`. r? `@thomcc`
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