title: Is there any computation or power used to keep npm running?
body: <p>I'm new to node, and running my app on my own machine via the command <code>npm run start</code>.  When I'm done working on the project for the day, is there any reason to stop the process from continuing?  I currently have no other node.js project right now, but if I did, I imagine I would only be able to run one npm process at a time. Is this correct?</p>
  
  <p>Without another node project to worry about, does the process run in a costly loop or do anything that might have unintended consequences for leaving it on 24/7? </p>