title: time user spent on the page
body: <p>Is there a library or solution for quick apache/nginx log parsing and finding out how much time a user has spent on each page?</p>
  
  <p>UPDATE: <strong>spent on every 3rd level domain</strong>.</p>
  
  <p>For example AWStat can do that ( A full log analysis enables AWStats to show you the following information: Visits duration and last visits)</p>