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<?php $cases = array(false, 0, 1, 2, 3, 4, 5, true, null); $ln = 100000; $s = microtime(true); for ($i = 0; $i < $ln; $i++) { $result = array(); foreach ($cases as $c) { $result[] = !!$c; } } var_dump('time : ' . (microtime(true) - $s) . ' for ' . $ln . ' times !!$c on each case, result:', $result); $s = microtime(true); for ($i = 0; $i < $ln; $i++) { $result = array(); foreach ($cases as $c) { $result[] = (bool)$c; } } var_dump('time : ' . (microtime(true) - $s) . ' for ' . $ln . ' times (bool)$c on each case, result:', $result);

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33.8 ms | 402 KiB | 5 Q