title: Infinite Scroll - auto load next certain number of posts in background
body: <p>I am developing a wordpress site using infinite scroll. It works fine. But I need to do some modification for visibly faster loading.
  When the site is completely loaded, I want to load few more posts to load automatically in background (user will have no idea that more contents are loading). When they reach the bottom of the page (or click on the load more posts button), it then shows those pre-loaded posts, and the system then starts to load few more posts in background again, and so on.
  By this way, user will see a lighting fast content load when they reaches the bottom of the page each time.</p>
  
  <p>Any idea how to achieve this please?</p>