Whenever you run 'time <command>' you could consider running 'hyperfine <command>' to get an answer that has been averaged over multiple runs.

I personally use command-line benchmarking to compare different tools. You might want to compare grep, ack, ag and ripgrep. I currently use it to profile my find-alternative fd and to compare it with find itself (https://github.com/sharkdp/fd-benchmarks).

You could also use it to find an optimal parameter setting for a command-line tool (make -j2 vs. make -j8).