<?php $ts = microtime(); for ($sum = 0, $i = 1; $i <= 50; $sum += $i, $i++); $time = microtime() - $ts; echo 'Imperative: ', $time, PHP_EOL; $ts = microtime(); array_sum(range(1, 50)); $time = microtime() - $ts; echo 'Functional: ', $time, PHP_EOL;
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