title: How to find out the reason for high energy and cpu impact?
body: <p>I wondering about my nearly finished app. It causing a CPU usage of always above 100% and my iPhone getting very hot even if it don't do anything.</p>
  
  <p>My app just loading some json from the internet and displays that with some images and text. At the beginning I had a spinning image for showing loading process and thats nearly it.</p>
  
  <p>I dont know how to find the part causing the usage.</p>
  
  <p><a href="https://i.stack.imgur.com/vKIpF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/vKIpF.png" alt="enter image description here"></a></p>
  
  <p>Here are the two bad guys, but I don't know what they do and where they come from:</p>
  
  <p><a href="https://i.stack.imgur.com/TkYzU.png" rel="noreferrer"><img src="https://i.stack.imgur.com/TkYzU.png" alt="enter image description here"></a></p>
  
  <p>It's so wired, my mainView is a Tableview, if I do nothing I have that over 100% cpu usage, if I scroll up and down, it drops down to 70%/80%.</p>