title: google apps script replacing innerHtml very slow
body: <p>I have a google apps script deployed as web app.  I'm trying to refresh the content by replacing the .innerHTML of some divs with html that is sent back from the server.</p>
  
  <p>For a modest amount of simple html (no more than 3 layers deep, basically 15 grids of 4x21 divs each) it's taking 25 seconds.</p>
  
  <p>I recorded timestamps and found that it acually is the calls to mydiv.innerHTML = newhtml (in the client) that are taking up all that time.</p>
  
  <p>Is this caja sanitation?  Reloading the whole page takes about 10 seconds, including at least 4 seconds of server time that I know of.  So why is this almost an order of magnitude slower?<br>
  Thanks.</p>