title: How to get notified of changes in an RSS feed
body: <p>I need to populate a database with data from an RSS feed. Is there anyway to ensure that I don't populate the database with duplicate information? </p>
  
  <p>I don't want to compare data in the database to determine if I have duplicate information as thi would be very slow. </p>
  
  <p>Similar to this question <a href="https://stackoverflow.com/questions/700607/how-to-detect-changed-and-new-items-in-an-rss-feed">How to detect changed and new items in an RSS feed?</a> but the answer is not what I am looking for. </p>