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--emit=asm seemed to be hurting performance significantly... So lets not recommend it for now.

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jon-chuang
2020-04-23 01:11:28 +08:00
parent a919e8658c
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README.md
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@@ -78,8 +78,9 @@ cargo +nightly bench
Compiling with `adcxq`, `adoxq` and `mulxq` instructions can lead to a 30-70% speedup. These are available on most `x86_64` platforms (Broadwell onwards for Intel and Ryzen onwards for AMD). Run the following command:
```bash
RUSTFLAGS="--emit=asm -C target-feature=+bmi2,+adx" cargo +nightly test/build/bench --features asm
RUSTFLAGS="-C target-feature=+bmi2,+adx" cargo +nightly test/build/bench --features asm
```
Tip: If optimising for performance, your mileage may vary with passing `--emit=asm` to `RUSTFLAGS`.
To bench `algebra-benches` with greater accuracy, especially for functions with execution times on the order of nanoseconds, use the `n_fold` feature to run selected functions 1000x per iteration. To run with multiple features, make sure to double quote the features.
```bash