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After reading this post, it has given me the impression that Node starts its event loop only when I start a server, with the listen() method.

Is that true ?

What happens if I start multiple servers on different ports ? Does that mean there are multiple event loops per server ?

Also what happens if on one terminal I write-:

node server1.js

and on the second terminal I write

node server2.js

How may node processes will be there and how many event loops will be running ?

So does the event loop start up with the node.js runtime or is it specific to the starting of an app/server ?

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    Definitely take a look here stackoverflow.com/questions/25568613/node-js-event-loop and stackoverflow.com/questions/22644328/… Commented Dec 14, 2016 at 12:07
  • @WiktorZychla I am sorry but I couldn't find the answer I was looking for. My question is that whether there is a single event loop for the entire Node runtime ? or is a loop started everytime I start a server. I guess that was not clear in my question so I have edited it. Commented Dec 15, 2016 at 4:56
  • Yes, there is a single loop per process. No, it starts regardless of your server, your app can do anything simpler than a server and you still have the loop there. Commented Dec 15, 2016 at 6:41
  • @WiktorZychla So, just correct me if I am wrong. If I write in one terminal node server1.js and open and another terminal and write node server2.js it will start another node process right ? Commented Dec 15, 2016 at 7:18
  • Yes, node is an OS app that, when invoked, starts a new process. Commented Dec 15, 2016 at 8:29
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