class TProp {
  public $foo = 'Foo';
}
$t = new TProp();
$start = microtime(true);
for($i=0;$i<10000;++$i) {
	$t->foo;
}
echo microtime(true) - $start, PHP_EOL;

class TMethod {
  private $_foo = 'Foo';
  public function getFoo() {
  	return $this->_foo;
  }
}
$t = new TMethod();
$start = microtime(true);
for($i=0;$i<10000;++$i) {
	$t->getFoo();
}
echo microtime(true) - $start, PHP_EOL;

class TMagic {
  private $_foo = 'Foo';
  public function getFoo() {
  	return $this->_foo;
  }
  public function __get($key) {
    return $this->{'_' . $key};
  }
}
$t = new TMagic();
$start = microtime(true);
for($i=0;$i<10000;++$i) {
	$t->foo;
}
echo microtime(true) - $start, PHP_EOL;