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14 changes: 10 additions & 4 deletions CONTRIBUTING.md
Original file line number Diff line number Diff line change
Expand Up @@ -397,12 +397,18 @@ which makes it a good target for benchmarking.
git clone --branch 3.10 https://github.com/python/cpython.git crates/ruff_linter/resources/test/cpython
```

Install `hyperfine`:

```shell
cargo install hyperfine
```

To benchmark the release build:

```shell
cargo build --release && hyperfine --warmup 10 \
"./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache -e" \
"./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ -e"
"./target/release/ruff check ./crates/ruff_linter/resources/test/cpython/ --no-cache -e" \
"./target/release/ruff check ./crates/ruff_linter/resources/test/cpython/ -e"

Benchmark 1: ./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache
Time (mean ± σ): 293.8 ms ± 3.2 ms [User: 2384.6 ms, System: 90.3 ms]
Expand All @@ -421,7 +427,7 @@ To benchmark against the ecosystem's existing tools:

```shell
hyperfine --ignore-failure --warmup 5 \
"./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache" \
"./target/release/ruff check ./crates/ruff_linter/resources/test/cpython/ --no-cache" \
"pyflakes crates/ruff_linter/resources/test/cpython" \
"autoflake --recursive --expand-star-imports --remove-all-unused-imports --remove-unused-variables --remove-duplicate-keys resources/test/cpython" \
"pycodestyle crates/ruff_linter/resources/test/cpython" \
Expand Down Expand Up @@ -467,7 +473,7 @@ To benchmark a subset of rules, e.g. `LineTooLong` and `DocLineTooLong`:

```shell
cargo build --release && hyperfine --warmup 10 \
"./target/release/ruff ./crates/ruff_linter/resources/test/cpython/ --no-cache -e --select W505,E501"
"./target/release/ruff check ./crates/ruff_linter/resources/test/cpython/ --no-cache -e --select W505,E501"
```

You can run `poetry install` from `./scripts/benchmarks` to create a working environment for the
Expand Down