<?php $a = range(0, 1000); $time = microtime(true); array_map(function($el) { return $el * $el; }, $a); var_dump(microtime(true) - $time); $time = microtime(true); $b = []; foreach ($a as $el) { $b[] = $el * $el; } var_dump(microtime(true) - $time);
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