title: How can I measure the response time of a user interaction with my web app?
body: <p>I have a mobile web app and I'd like a method of measuring the time it takes for my app to respond to a user interaction. An example would be measuring the time it takes for a button to change appearance (to show the user that it is clicked) after the initial tap of the button. </p>
  
  <p>I'm not aware of any chrome development tools that can do this, but if you know of any tools or methods of measuring UI response times it would be greatly appreciated! </p>
  
  <p>Thanks!</p>