hyperfine

MIT/Apache-2.0 statistical CLI benchmarker

Rust / Terminal · Apache-2.0 · 29.1k

Reviewed 2026-09-10 · last push 2026-10-12 · repo checked 2026-10-19

What's Good

MIT OR Apache-2.0. sharkdp/hyperfine. Runs commands repeatedly with warmup, statistical summary (mean/stddev/min/max), export to Markdown/CSV/JSON, and parameter sweeps (`-P`). Cross-platform. The default answer for comparing two CLIs fairly.

The Catch

It benchmarks *process wall time*, not flamegraphs or allocator profiles — pair with a profiler when the hot path is inside one long process. Shell overhead and cold caches still skew naive runs; read the warmup flags. Not a load-test / HTTP soak tool.

Verdict

MIT/Apache-2.0 CLI bench. Free forever; replace anecdotal `time` with numbers you can paste into a PR.

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