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@ 2017-07-08T08:00:37Z

<?php

function ref(&$array) {
    foreach ($array as $item) {
        $tem;
    }
}

$start = microtime(true); 
$array = range(0, 1000);
ref($array);
echo 'time: '.(microtime(true) - $start).' сек.';

Output
Performance
VLD
References
Branches

microtime: documentation ( source)
range: documentation ( source)

preferences:dark modelive preview

35.03 ms | 402 KiB | 5 Q