/** * @author https://codepen.io/bookmarklets * @file Why is this page slow? * Original Source {@link https://cdpn.io/bookmarklets/fullpage/NobJbq#} */ javascript:(function(y,p,o){p=y.body.appendChild(y.createElement('iframe'));p.id='YSLOW-bookmarklet';p.style.cssText='display:none';o=p.contentWindow.document;o.open().write('');o.close()}(document))