Mine

<?php

include 'includes/bootstrap.inc';
echo "Initialize 1 million objects: ";
timer_start('x');
for ($i = 0; $i < 1000000; $i++) {
  $object = new stdClass();
}
echo timer_read('x');
echo "ms\nInitialize 1 million arrays: ";
timer_start('x');
for ($i = 0; $i < 1000000; $i++) {
  $array = array();
}
echo timer_read('x');
echo "ms\n";