result.txt

0
0000: 3,170,640 B
1
0001: 3,399,976 B
2
0002: 3,629,320 B
3
0003: 3,858,696 B
4
0004: 4,087,984 B
5
0005: 4,317,312 B
6
0006: 4,612,200 B
7
0007: 4,841,600 B
8
0008: 5,070,968 B
9
0009: 5,300,352 B

test.php

<?php
chdir(__DIR__);

// Setup autoloading
require 'init_autoloader.php';

for($i = 0; $i < 10; $i++) {
    echo $i.PHP_EOL;
    // Run the application!
    Zend\Mvc\Application::init(require 'config/application.config.php');
    gc_collect_cycles();
    echo sprintf('%1$04d: ', $i) . number_format(memory_get_usage()) . " B".PHP_EOL;
}