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@ 2013-03-06T16:16:47Z

<?php
$a = array (
  0 =>
  array (
    'php' => "5.3",
  ),
  1 =>
  array (
    'php' => "5.3",
  ),
  2 =>
  array (
    'php' => "5.3",
  ),
);
$loopSize = 100000;

for ($i = 0; $i < $loopSize; $i++) {
    $a = array_map('serialize', $a);
    $a = array_unique($a);
    $a = array_map('unserialize', $a);
}

Output
Performance
VLD
References
Branches

array_map: documentation ( source)
array_unique: documentation ( source)

preferences:dark modelive preview

37.75 ms | 402 KiB | 5 Q