title: Why does node.js suddenly use less memory?
body: <p>I have a 25MB json file, that I "require" why my app starts up. Initial it seems that the node.js process takes up almost 200MB of memory.</p>
  
  <p>But if I leave it running and come back to it, Activity monitor reports that it is using only 9MB which makes no sense at all! At the very least, it should be a few MB more, since even a simple node.js app that does almost nothing (acting like a server), uses 9MB.</p>
  
  <p>The app seems to work fine - it is a server, that provides search suggestions form a word list of 220,000 words.</p>
  
  <p>Is Activity Monitor wrong ?
  Why is it using only 9MB, but initially used ~200MB when the application started up ?</p>