Reference caching test

cache.php

<?php

require("class.php");

$cache = $a->a->a;

for ($i=1; $i<=$loopcount; $i++) {
	$cache->a;
}

class.php

<?php

class A {
	public $prop;
}


$a = new A;
$a->a = new A;
$a->a->a = new A;
$a->a->a->a = "Ahoooj";

$loopcount = 10e6;

direct.php

<?php

require("class.php");


for ($i=1; $i<=$loopcount; $i++) {
	$a->a->a->a;
}

results

$ time php -f direct.php 

real	0m3.634s
user	0m3.640s
sys	0m0.000s
$ time php -f cache.php 

real	0m2.037s
user	0m2.020s
sys	0m0.020s