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@ 2014-07-11T09:17:16Z

<?php

$null = NULL;
$empty = '';

$start=microtime(TRUE);
for($i=0;$i<100000;$i++) {
	if($empty === '') {

    }
}
var_export(microtime(TRUE)-$start);
echo "\n";

$start=microtime(TRUE);
for($i=0;$i<100000;$i++) {
	if(!isset($null)) {

    }
}
var_export(microtime(TRUE)-$start);
echo "\n";

Output
Performance
VLD
References
Branches

microtime: documentation ( source)
var_export: documentation ( source)

preferences:dark modelive preview

39.28 ms | 402 KiB | 5 Q