title: Is this js heap graph worrying? How can I fix it?
body: <p>I have recorded the performances of an angular 4.4 app and I think that what the Chrome dev tools returned me about the js heap could be worrying, but I honestly <strong>lack</strong> on this subject. </p>
  
  <p>I don't understand the straight drop at ~20000ms, the straight line soon after and the other drop at ~60000ms: what are they due to? Are those behaviours normal or do they means that something should be fixed? </p>
  
  <p><a href="https://i.stack.imgur.com/Axzfq.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Axzfq.png" alt="enter image description here"></a></p>