title: How can you remove or block event listeners from third party JavaScript tracking & analytics?
body: <p>I run an e-commerce website and we have various third-party JavaScript that add click handlers to links and forms and then insert a delay to make sure the tracking goes through. The delay is inserted by burning CPU and running a for or while loop until a certain date is passed either 350 ms later (Marketo / Munchkin) or 500ms for Visual Website Optimizer. Combined this is almost 1 second!</p>
  
  <p>Sometimes, maybe the delay is nice so tracking can be more reliable. However, we don't want this to happen when you click most links on our site because it adds up to 1 second of delay for the user. With that big a delay, there goes all the other performance optimizations we've done!</p>
  
  <p>Unfortunately, we need a lot of the functionality of these scripts (like Visual Website Optimizer and Marketo) so we can't remove them.</p>
  
  <p>Is it possible to remove the handlers they've added or prevent them from firing, given that I don't have references to them?</p>