That's not particularly optimized; it's als from 2003, when speedcubing was not as advanced. If you want a fairly good attempt at an understandable minimum method, look at http://www.speedsolving.com/wiki/index.php/8355_Method
(Although memory shouldn't really matter for such few moves. Blindfolded solving is where it gets interesting.)
(Although memory shouldn't really matter for such few moves. Blindfolded solving is where it gets interesting.)