Pyro has builtin support for benchmarking functions using the time command:

$ pyro time --help

Usage: pyro time [files]

  This command runs benchmarking functions. Each input
  file is executed in a new VM instance.

Arguments:
  [files]                 Files to benchmark.

Options:
  -n, --num-runs <int>    Number of times to run each
                          function.

Flags:
  -h, --help              Print this help text and exit.

For each input file specified, Pyro first executes the file, then runs any benchmarking functions it contains, i.e. functions whose names begin with $time_.

By default Pyro runs each benchmarking function 10 times, then prints the mean execution time. The number of iterations can be customized using the -n/--num-runs option.