Testing http://soboxer.staging.wpengine.com/ on https://developers.google.com/speed/pagespeed/insights I get a Desktop score of 78/100 and a worrying Mobile score of 63/100. As you’ll see the low score is mainly down to render-blocking JavaScript and CSS in above-the-fold content. Apart from what you have recommended I’ve made no changes to the standard code. What can I do to improve page performance?