title: React native for android run very slow when not enable "Debug JS"
body: <p>I am developing an app using react native, I use some code base for ios and android, the ios version run smoothly.</p>
  
  <p>But the android version run very slowly. the weird thing is: </p>
  
  <p>When I shake the phone, and click "Debug JS" to enable debug in chrome feature, it run faster, anyone have a clue about the reason?</p>