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@ 2013-10-31T16:59:32Z

<?php
$x = 129;

$y = 1;
$m = microtime(true);
$y = 1 << ceil(log($x, 2));
echo ($m - microtime(true)), "\n\r";

$y = 1;
$m = microtime(true);
while ($y < $x) {
	$y = $y <<1;
}
echo microtime(true) - $m;

Output
Performance
VLD
References
Branches

microtime: documentation ( source)
ceil: documentation ( source)
log: documentation ( source)

preferences:dark modelive preview

32.15 ms | 402 KiB | 5 Q