title: Detecting event loop "lag"
body: <p>If a browser application performs more computationally heavy, or blocking operations, then the event loop will lengthen.</p>
  
  <p>Is there a way to get <em>qualitative</em> metrics regarding the length of the event loop?</p>
  
  <p>This is with a view to gauging how "easily" a client-side web application is rendering on the client (i.e. whether it has sufficient computational resources to deliver a smooth, timely experience).</p>