title: Unity takes 100% CPU in an empty scene
body: <p>Why when we build a game scene with unity3d it uses 100% of CPU ?!</p>
  
  <p>I mean it's not a matter of a scene with many objects and things or an empty scene, in both cases CPU usage is 100%.</p>
  
  <p>Why?</p>
  
  <p>How can I reduce it?</p>
  
  <p>The reason that I want to reduce CPU usage is :
  I want to run multiple <code>exe</code> in a dedicated server for a multiplayer game that I made with unity <code>UNET</code> and in this scenes, I have nothing except some functions and <code>syncvars</code> even I have no update function ...
  I just want to make this <code>exe</code> files use less CPU to running better and increase performance.</p>
  
  <p>Is that Possible to reduce CPU usage?</p>