Memory usage test

mem_usage.php

<?php
class Foo {
    function __construct()
    {
        $this->bar = new Bar($this);
    }
}

class Bar {
    function __construct($foo = null)
    {
        $this->foo = $foo;
    }
}

$i = 0;
while (true) {
    $foo = new Foo();
//    $foo->__destruct();
    unset($foo);
    $i++;
    if ($i % 100000 == 0) {
        echo number_format(memory_get_usage()) . "\n";
    }
}
?>

Copied from here: http://paul-m-jones.com/archives/262