Non-prefetchable Content

• Many objects are not really prefetchable!
  • Uncacheable content.
  • Content whose retrieval causes side-effects.
• Ideally these are handled by a revision to HTTP.
• Most researchers identify URLs that look dynamic.
  • i.e., URLs with ? or cgi within the URL, or POST reqs.
  • Such URLs represent 28% of the pages in our dataset.
• In addition, when next URL is not in list of URLs, prediction scheme cannot succeed (another 47%).
• Remaining 25% may be predicted correctly.