title: UI performance monitoring tools
body: <p>I am looking for a tool that lets you monitor/log page rendering time on <strong>client machines</strong>. I am not looking for firebug/yslow because i want to know the following type of things:</p>
  
  <ul>
  <li>How does fast do my pages load when the user is in russia?</li>
  <li>How long does it take for javascript to run on some pages for everyone who accesses those pages?</li>
  </ul>
  
  <p>So, i actually care what my site <em>feels like</em> to the people who use it. Do there exist tools that already do this? </p>
  
  <p>I should add that my website is a software as a service website, <strong>not accessible publicly</strong>.</p>