functions.php

function add_bulk_async_sdk() { ?>
      <script>
  	(function(doc, script) {
           var js,
	   fjs = doc.getElementsByTagName(script)[0],
	   add = function(url, id) {
	     if (doc.getElementById(id)) {return;}
	     js = doc.createElement(script);
	     js.src = url;
	    id &amp;&amp; (js.id = id);
	     fjs.parentNode.insertBefore(js, fjs);
	   };
						 
	   // Google Analytics
	   add(('https:' == location.protocol ? '//ssl' : '//www') + '.google-analytics.com/ga.js', 'ga');
	   // Google+ button
	   add('https://apis.google.com/js/plusone.js');
	   // Facebook SDK
	   add('//connect.facebook.net/en_US/all.js', 'facebook-jssdk');
	   // Twitter SDK
	   add('//platform.twitter.com/widgets.js', 'twitter-wjs');
	   // Pinterest
	   add('//assets.pinterest.com/js/pinit.js');
						
	}(document, 'script'));
     </script>
<?php
}
add_action('genesis_before', 'add_bulk_async_sdk');