Webhook Prefetch for Prev/Next items

gistfile1.html

Place this in your head. 
{% block head_extra %}
  {% set prev = prevItem(item, 'publish_date', true) %}
  {% set next = nextItem(item, 'publish_date', true) %}
  {% if prev %}
    <link rel="prefetch" href="{{ url(prev) }}" />
  {% endif %}
  {% if next %}
    <link rel="prefetch" href="{{ url(next) }}" />
  {% endif %}
{% endblock %}

and some tutorials
http://davidwalsh.name/html5-prefetch
https://medium.com/@luisvieira_gmr/html5-prefetch-1e54f6dda15d