title: react native navigation performance
body: <p>I have the Issue with React Native Navigation V2 that there is quite a long waiting time until I can view the next screen. </p>
  
  <p>And I read that it seems to be normal, since react native has to render all components of the new Screen.</p>
  
  <p>So I was wondering if there are certain patterns for better performance 
  or ways to hide the loading time (through loading circles or transitions)? </p>