PHP Session Storage Performance Tests

gistfile1.php

/*
 * Store random data in array and use in_array() for duplicate checking
 */

$then = microtime(TRUE);
$i    = 1;
while ($i <= 1000) {
	$rand               = rand();
	$now                = microtime(TRUE);
	if (!in_array($data, $_SESSION[$node])) {
		$_SESSION[$node][$rand] = array('time' => $now - $then, 'random' => $rand);
	}
	$i++;
}
echo sprintf("Total Elapsed:  %f", $now - $then);

 ### Total Elapsed: 0.038185 ###


/*
 * Store random data in array and use isset() for duplicate checking
 */

$then = microtime(TRUE);
$i    = 1;
while ($i <= 1000) {
	$rand               = rand();
	$now                = microtime(TRUE);
	if (!isset($_SESSION[$node][$rand])) {
		$_SESSION[$node][$rand] = array('time' => $now - $then, 'random' => $rand);
	}
	$i++;
}
echo sprintf("Total Elapsed:  %f", $now - $then);

 ### Total Elapsed: 0.001815 ###



/*
 * Store random data in object and use property_exists() for duplicate checking
 */

$then            = microtime(TRUE);
$i               = 1;
$_SESSION[$node] = new stdClass();
while ($i <= 1000) {
	$rand = rand();
	$now  = microtime(TRUE);
	if (!property_exists($_SESSION[$node], $rand)) {
		$_SESSION[$node]->$rand = array('time' => $now - $then, 'random' => $rand);
	}
	$i++;
}
echo sprintf("Total Elapsed:  %f", $now - $then);

 ### Total Elapsed: 0.003383 ###