prerender and prefetch in wp

header.php

<?php if(is_front_page()): ?>
// do not use prefecth on homepage
<?php elseif (is_singular()): ?>
  // load the next post, view http://ideasandpixels.com/get-only-url-of-next-and-previous-posts-wordpress
  <link rel="prefetch" href="<?php echo get_permalink(get_adjacent_post(false,'',true)); ?>">
  <link rel="prerender" href="<?php echo get_permalink(get_adjacent_post(false,'',true)); ?>">
<?php else: ?>
  <link rel="prefetch" href="<?php echo home_url(); ?>">
  <link rel="prerender" href="<?php echo home_url(); ?>">
<?php endif; ?>