title: Game view is slower than build - unity 2017.2.0f3
body: <p>I am creating a sample 2D Unity tutorial.
  If I run the game using play mode in the UnityEditor, the game seems <strong>very slow</strong>, and skips some frames. The standalone version runs smooth.</p>
  
  <p>Did I configure something wrong?</p>
  
  <p><a href="https://i.stack.imgur.com/cRG9q.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/cRG9q.png" alt="Lighting Settings"></a>
  <a href="https://i.stack.imgur.com/Asx1K.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Asx1K.png" alt="Lighting Settings"></a></p>