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| author | bors <bors@rust-lang.org> | 2022-05-10 03:11:05 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2022-05-10 03:11:05 +0000 |
| commit | 87fd70c107b23fe08336a12a20a0f5e85561d499 (patch) | |
| tree | 997f3eb1fa15a33db5dd604227aa031dca1a94ec /compiler/rustc_codegen_llvm/src/llvm_util.rs | |
| parent | 362010d6be0e551fa35c6e0488abb18686b2add4 (diff) | |
| parent | 5f4b174de28e5a07c9924d69af2c018048676956 (diff) | |
| download | rust-87fd70c107b23fe08336a12a20a0f5e85561d499.tar.gz rust-87fd70c107b23fe08336a12a20a0f5e85561d499.zip | |
Auto merge of #96803 - jyn514:faster-assemble, r=Mark-Simulacrum
Make "Assemble stage1 compiler" orders of magnitude faster
This used to take upwards of 5 seconds for me locally. I found that the culprit was copying the downloaded LLVM shared object:
```
[22:28:03] Install "/home/jnelson/rust-lang/rust/build/x86_64-unknown-linux-gnu/ci-llvm/lib/libLLVM-14-rust-1.62.0-nightly.so" to "/home/jnelson/rust-lang/rust/build/x86_64-unknown-linux-gnu/stage1/lib/rustlib/x86_64-unknown-linux-gnu/lib/libLLVM-14-rust-1.62.0-nightly.so"
[22:28:09] c Sysroot { compiler: Compiler { stage: 1, host: x86_64-unknown-linux-gnu(x86_64-unknown-linux-gnu) } }
```
It turned out that `install()` used full copies unconditionally. Change it to try using a hard-link before falling back to copying.
Diffstat (limited to 'compiler/rustc_codegen_llvm/src/llvm_util.rs')
0 files changed, 0 insertions, 0 deletions