title: Google Chrome Heap Snapshots (closure), (array), (system), (compiled code) under programmer control?
body: <p>I have noticed that the properties I mentioned in the title climb significantly in my page (especially '(closure)'). </p>
  
  <p>Is this OS and/or browser controlled? Can I do anything about it?</p>
  
  <p>What exactly <em>is</em> (closure), (array), (compiled code), (system), etc.?</p>
  
  <p>Also, what is the difference between (array) and 'Array'? </p>