benchmark.rb

#!/usr/bin/env ruby
require 'benchmark'

command= "#{ARGV.shift} &> /dev/null"
run_times = ARGV.shift.to_i

usage = "benchmark.rb <command> <times_to_run>"

unless run_times > 0
  fail usage
end

unless system(command)
  fail "#{command} failed"
end

puts "Running #{command}"
puts "#{run_times} times"

Benchmark.bm do |x|
  x.report do
    run_times.times do
      system(command)
    end
  end
end