hyperfine

https://github.com/sharkdp/hyperfine

A command-line benchmarking tool

• Statistical analysis across multiple runs.
• Support for arbitrary shell commands.
• Constant feedback about the benchmark progress and current estimates.
• Warmup runs can be executed before the actual benchmark.
• Cache-clearing commands can be set up before each timing run.
• Statistical outlier detection to detect interference from other programs and caching effects.
• Export results to various formats: CSV, JSON, Markdown, AsciiDoc.
• Parameterized benchmarks (e.g. vary the number of threads).
• Cross-platform

Runs a command or multiple commands multiple times and reports the results

here's an example usage where I benchmark four programs in different languages running the same regular expression