time only print the the execution second time of a command.
If there is a solution like IPython's powerful
timeit magic command, great.
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time uses the
TIMEFMT variable to control the format. By default, this is
%J %U user %S system %P cpu %*E total, which produces the following.
$ time sleep 2 sleep 2 0.00s user 0.00s system 0% cpu 2.002 total
This does produce millisecond accuracy (at least for
total), so perhaps your system has a different default set (lagging distro?), or has modified
Have a look at the manual page for possible formats. I use the following in
which produces the following.
$ time sleep 2 ================ CPU 0% user 0.003 system 0.000 total 2.006
timeit magic command will by default print a statistics report over several executions of your statement. The zsh reserved word
time will only run your command once.
When you only care about measuring the execution time of external commands (and not builtins and functions) you can use hyperfine. It's a program that repeatedly executes a command for you and prints some statistics.