Comparing spyc vs. Symfony vs. JSON parsing

benchmark_yaml.php

<?php

require_once __DIR__ . '/core/vendor/autoload.php';
require_once __DIR__ . '/core/includes/bootstrap.inc';
drupal_bootstrap(DRUPAL_BOOTSTRAP_CODE);

$yaml_files = file_scan_directory('./test_yaml', '/\.yml$/');

$start = microtime(TRUE);
$yaml_contents = array();

$parser = new Symfony\Component\Yaml\Parser();
foreach ($yaml_files as $file) {
  $parser->parse(file_get_contents($file->uri));

  // Convert YAML to identical JSON copies of the same files.
  //$json_version = json_encode($yaml_contents[$file->name]);
  //$file_name = str_replace('.yml', '.json', str_replace('_yaml', '_json', $file->uri));
  //file_put_contents($file_name, json_encode($yaml_contents[$file->name], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
}
$total = microtime(TRUE) - $start;
print "Symfony YAML parsing time: $total<br />";

$start = microtime(TRUE);
$yaml_contents = array();
require_once __DIR__ . '/spyc/Spyc.php';
foreach ($yaml_files as $file) {
  spyc_load_file($file->uri);

  // Convert YAML to identical JSON copies of the same files.
  //$json_version = json_encode($yaml_contents[$file->name]);
  //$file_name = str_replace('.yml', '.json', str_replace('_yaml', '_json', $file->uri));
  //file_put_contents($file_name, json_encode($yaml_contents[$file->name], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
}
$total = microtime(TRUE) - $start;
print "Spyc YAML parsing time: $total<br />";


$json_files = file_scan_directory('./test_json', '/\.json$/');
$start = microtime(TRUE);
$json_contents = array();
foreach ($json_files as $file) {
  json_decode(file_get_contents($file->uri));
}
$total = microtime(TRUE) - $start;
print "JSON parsing time: $total<br />";

Did you ever post the results of this test anywhere? I'm evaluating which to use.