Testing performances of curl / curl_multi with php

multi-curl-test.php

<?php

/**
 * @file Testing multiple curl / single curl.
 */

/**
 * Multi curl.
 *
 * @param array $urls
 */
function testMultiCurl(array $urls) {
  $urlCount = count($urls);
  $curlHandles = [];
  $curlMultipleHandle = curl_multi_init();
  for ($i = 0; $i < $urlCount; $i++) {
    $url = $urls[$i];
    $curlHandles[$i] = curl_init($url);
    curl_setopt($curlHandles[$i], CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($curlHandles[$i], CURLOPT_HEADER, TRUE);
    curl_setopt($curlHandles[$i], CURLOPT_NOBODY, TRUE);
    curl_multi_add_handle($curlMultipleHandle, $curlHandles[$i]);
  }

  do {
    $status = curl_multi_exec($curlMultipleHandle, $running);
    if ($running) {
      curl_multi_select($curlMultipleHandle);
    }
  } while ($running && $status === CURLM_OK);

  for ($i = 0; $i < $urlCount; $i++) {
    $results[] = curl_getinfo($curlHandles[$i], CURLINFO_HTTP_CODE);
    curl_multi_remove_handle($curlMultipleHandle, $curlHandles[$i]);
  }
  curl_multi_close($curlMultipleHandle);

  print("Multi curl\n");
  print_r($results);
}

/**
 * Single curl.
 *
 * @param array $urls
 */
function testSingleCurl(array $urls) {
  $results = [];
  foreach ($urls as $url) {
    $curlHandle = curl_init($url);
    curl_setopt($curlHandle, CURLOPT_RETURNTRANSFER, TRUE);
    curl_setopt($curlHandle, CURLOPT_HEADER, TRUE);
    curl_setopt($curlHandle, CURLOPT_NOBODY, TRUE);
    curl_exec($curlHandle);
    $results[] = curl_getinfo($curlHandle, CURLINFO_HTTP_CODE);
    curl_close($curlHandle);
  }

  print("Single curl\n");
  print_r($results);
}

$urls = [
  "https://duckduckgo.com",
  "https://www.drupal.org",
  "https://laravel.com",
  "https://mastodon.social",
  "https://www.nova.fr",
  "https://www.arte.tv",
  "https://www.raspberrypi.org",
];

//testSingleCurl($urls);
testMultiCurl($urls);

//======================================
// Output for `time php multi-curl.php`
//======================================
//
// Single curl (3 runs)
//-------------------------------------
// php multi-curl.php  0.14s user 0.03s system 12% cpu 1.325 total
// php multi-curl.php  0.14s user 0.03s system 4% cpu 3.533 total
// php multi-curl.php  0.14s user 0.03s system 2% cpu 6.283 total
//
// Multi curl (3 runs)
//-------------------------------------
// php multi-curl.php  0.12s user 0.02s system 35% cpu 0.400 total
// php multi-curl.php  0.11s user 0.03s system 34% cpu 0.392 total
// php multi-curl.php  0.11s user 0.02s system 37% cpu 0.360 total