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| author | Joshua Nelson <jnelson@cloudflare.com> | 2022-05-06 22:42:36 -0500 |
|---|---|---|
| committer | Joshua Nelson <jnelson@cloudflare.com> | 2022-05-08 22:43:18 -0500 |
| commit | 5f4b174de28e5a07c9924d69af2c018048676956 (patch) | |
| tree | a3672215d3aa6832bed410c203564732bd43887e /compiler/rustc_codegen_llvm/src/llvm_util.rs | |
| parent | 30f386087564243ab88a93c984c265290a31580b (diff) | |
| download | rust-5f4b174de28e5a07c9924d69af2c018048676956.tar.gz rust-5f4b174de28e5a07c9924d69af2c018048676956.zip | |
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