sse2_strtolower.php

<?php

function A() {
}

function Aaaa() {
}

function Aaaaaaaa() {
}

function Aaaaaaaaaaaaaaaa () {
}

function bench($func) {
	$i = 0;
	$start = microtime(true);
	while ($i++ < 1000000) {
		$func();
	}
	echo "calling $func using ", microtime(true) - $start, "s\n";
}

bench("A");
bench("Aaaa");
bench("Aaaaaaaa");
bench("Aaaaaaaaaaaaaaaa");