title: How to implement “Building a More Performant Layout” in code on WWDC18 session 220
body: <p>I recently watched the video of WWDC18. I am very interested in the example mentioned in it. There is such a problem in my own app. However, the engineer only talked about the concept and did not have the example code. I really want to know how to use the code to realize the wonderful idea in the session 220.</p>
  
  <p>link:<a href="https://developer.apple.com/videos/play/wwdc2018/220/?time=1699" rel="nofollow noreferrer">High Performance Auto Layout</a></p>
  
  <p><a href="https://i.stack.imgur.com/LIhI7.jpg" rel="nofollow noreferrer">I want to know how this is implemented</a></p>
  
  <p>Thank you.</p>