Test2.php: 8.0589056015015 Test1.php: 8.0747842788696

test1.php

<?php

// Create array
$items = range(0,100000);
$times = array();

$realArray = array(); // id and name
$metaArray = array(); // token and bob

foreach ($items as &$item) {
  $realArray[] = array(
		'id' => $item['id'],
		'name' => $item['name'],
	);
	$metaArray[] = array(
		'token' => $item['token'],
		'bob' => $item['bob'],
	);
}

$times[0] = microtime(true);

foreach ($realArray as $item) {
	if ($item['id'] === 30) {
		false;
	}
}

$times[1] = microtime(true);

echo ($times[1] - $times[0]) * 100;

test2.php

<?php

// Create array
$items = range(0,100000);
$times = array();

$bigArray = array(); // all data is stored

foreach ($items as &$item) {
	$bigArray[] = array(
		'id' => $item['id'],
		'name' => $item['name'],
		'token' => $item['token'],
		'bob' => $item['bob'],
	);
}

$times[0] = microtime(true);

foreach ($bigArray as $item) {
	if ($item['id'] === 30) {
		false;
	}
}

$times[1] = microtime(true);

echo ($times[1] - $times[0]) * 100;