dead simple profiling in PHP 5.3

profile.php

<?php
function profile( $message, $closure ) {
	$start = microtime( true );
	$closure( $start );
	$duration = ( microtime( true ) - $start );
	return "{$message} {$duration}\n";
}

simple_test.php

<?php
require_once "profile.php";

echo profile( "Looping!", function( $start ) {
	$n = 0;
	for( $i = 0; $i < 1000; $i++ ) {
		$n += $i;
	}
});