poor man's php benchmark

bmrk.php

<?php
  
  define("BENCH_ITERATIONS", 1000);

  $scenarios = [];
  // scenario one
  $scenarios['one'] = function () {
    $start = microtime(true);
    // do stuff in between the microtimes
    return microtime(true) - $start;
  };
  
  // scenario two
  $scenarios['two'] = function () {
    $start = microtime(true);
    return microtime(true) - $start;
  };
  
  foreach ($scenarios as $name => $fn) {
    $times = [];
    for ($i = 0; $i < BENCH_ITERATIONS; $i++) {
      $times[] = call_user_func($fn);
    }
    fwrite(STDOUT, sprintf("scenario: %s -- average running time: %.3fs\n", $name, (array_sum($times) / BENCH_ITERATIONS)));
  }