bench_php_static.php

<?php

class A {
	private static $__value = 'Foo';
	public function getValue() {
		return self::$__value;
	}
}

class B {
	private static $__value = 'Foo';
	public function getValue() {
		return static::$__value;
	}
}

$iterations = 5000000;


$results = array();
$a = new A();
for ($loop = 0; $loop < 5; $loop++) {
	$start = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$a->getValue();
		}
	$elapsed = microtime(true) - $start;
	$results[] = $elapsed;
}
unset($a);
$average = array_sum($results) / count($results);
echo "self::   => $average\n";


$results = array();
$b = new B();
for ($loop = 0; $loop < 5; $loop++) {
	$start = microtime(true);
		for ($i = 0; $i < $iterations; $i++) {
			$b->getValue();
		}
	$elapsed = microtime(true) - $start;
	$results[] = $elapsed;
}
unset($b);
$average = array_sum($results) / count($results);
echo "static:: => $average\n";


// Results (PHP 5.3.0 cli)
//    self::   => 2.2726522445679
//    static:: => 2.2912198543549


?>