class Test {

    public function hello() {
        
    }

    public function helloa() {
        
    }

    public function hellob() {
        
    }

}

function microtimeFloat() {
    list($usec, $sec) = explode(" ", microtime());
    return ((float) $usec + (float) $sec);
}

$test = new Test();
for ($index1 = 0; $index1 < 10; $index1++) {
    $begin1 = microtimeFloat();
    for ($index = 0; $index < 1000; $index++) {
        $class = new ReflectionClass($test);
        $methods = $class->getMethods();
        foreach ($methods as $method) {
            $method->invoke($test);
        }
    }
    echo microtimeFloat() - $begin1 . ‘----‘;

    $begin2 = microtimeFloat();
    for ($index = 0; $index < 1000; $index++) {
        $methods = get_class_methods($test);
        foreach ($methods as $method) {
            $test->$method();
        }
    }
    echo microtimeFloat() - $begin2;
    echo ‘<br/>‘;
}