How to have heavy processing operations done in node.js

Question

I have a heavy data processing operation that I need to get done per 10-12 simulatenous request. I have read that for higher level of concurrency Node.js is a good platform and

Answer 1

Yes it will block it, as the callback functions are executed in the main loop. It is only the asynchronously called functions which do not block the loop. It is my understanding that if you want the image processing to execute asynchronously, you will have to use a separate processes to do it.

Note that you can write your own asynchronous process to handle it. To start you could read the answers to How to write asynchronous functions for Node.js.

UPDATE

how do i create a non-blocking asynchronous function in node.js? may also be worth reading. This question is actually referenced in the other one I linked, but I thought I'd include it here to for simplicity.