test.rb

Iters = 10000N = 4Meths = {  :shuf   => "gshuf -i 0-#{N-1} -n 1",  :seq    => "gseq 0 #{N-1} | gsort -R | head -n1",  :urand1 => "echo $(($(printf '%d' \"'`head -c 1 /dev/urandom | base64 | tr A D`\")%4))",  :urand2 => "echo $(($(printf '%d' \"'`head -c 1 /dev/urandom | base64`\")%4))"}def test(cmd)  t = Time.now  results = [0] * N  1.upto(Iters) do    i = `#{cmd}`.to_i    results[i] += 1  end  puts(Time.now - t)  resultsendMeths.each do |meth, cmd|  print "[#{meth}]"  test(cmd).each_with_index do |n, i|    puts "    #{i}: #{n}"  end  putsend