title: Admin Ajax causing slow wordpress site (waterfall)
body: <p><img src="https://i.imgur.com/05gDDQi.png" alt="Text"></p>
  
  <p>Can someone help me figure out how to fix the slow admin-ajax.php problem? Sorry I'm new to wordpress. </p>
  
  <p>I understand it could be related to the wpbakery (visual composer) plugin used to build the site. But I've disabled plugins one by one and can't figure out the cause.</p>
  
  <p>EDIT: I've used Heartbeat API Plugin as well to no avail.</p>
  
  <p>Thanks in advance.</p>
  
  <p><a href="https://i.imgur.com/05gDDQi.png" rel="nofollow noreferrer">https://i.imgur.com/05gDDQi.png</a></p>