n.
        </li>
        
<li>
          Give IEx the opportunity to cache. In particular, ensure the
          server does not set any headers causing IEx not to cache the
          content. This may be a real problem if the document is sent
          over HTTPS, because most IEx installations will by default
          <em>not</em> cache any content retrieved over HTTPS.
          Setting the <span class="codefrag">Expires</span> header entry may help in
          this case:<br> 
<span class="codefrag">res