Seriously.<p>CSS loading&#x2F;parsing is render blocking. By loading CSS that isn&#x27;t needed immediately asynchronously in a way that will use the browser cache if it&#x27;s available, it makes the page visible much faster.  It feels like overkill in the simple example, but it&#x27;s a tried and true method. ( <a href="https:&#x2F;&#x2F;github.com&#x2F;filamentgroup&#x2F;loadCSS" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;filamentgroup&#x2F;loadCSS</a> has &gt; 2k stars if that kinda thing means anything)<p>From my experience on a large website (m.trulia.com), On a 3G connection with an &#x27;average&#x27; (nexus 5) phone, this technique made almost a 2 second difference in perceived load time.