cmdperf

cmdperf is a terminal‑based utility that measures the execution time and statistical characteristics of shell commands. It runs each command in its own shell (or directly) and gathers live metrics such as mean, minimum, maximum, and standard deviation, presenting them in an interactive text UI that updates progress, statistics, and estimated completion time as the benchmark proceeds.

The tool supports parallel execution and rate limiting, allowing developers to simulate concurrent loads or controlled request rates when testing commands. Multiple commands can be specified in a single invocation, and their results are displayed side‑by‑side for easy comparison. Output can be exported in Markdown or CSV formats for documentation or further analysis.

cmdperf targets developers who need quick, “quick‑and‑dirty” performance insights rather than rigorous scientific measurement. It is distributed as a compiled binary for Linux, macOS, and Windows, and can be installed via Go, Homebrew, package managers, or pre‑built releases.