$ hyperfine --warmup 10 -n main --prepare "git checkout main" ".venv/bin/check-sdist --help" -n PR --prepare "git checkout henryiii/chore/lazy" ".venv/bin/check-sdist --help"
Benchmark 1: main
  Time (mean ± σ):      45.3 ms ±   0.8 ms    [User: 35.3 ms, System: 7.8 ms]
  Range (min … max):    43.8 ms …  48.8 ms    41 runs

Benchmark 2: PR
  Time (mean ± σ):      34.3 ms ±   0.5 ms    [User: 26.7 ms, System: 5.7 ms]
  Range (min … max):    32.8 ms …  36.1 ms    48 runs

Summary
  PR ran
    1.32 ± 0.03 times faster than main