title: How to multi-thread child_process.exec() in Node.js?
body: <p>I am currently building an application that uses <code>child_process.exec()</code>.
  The issue I am running into is, upon concurrent requests, maybe my <code>exec()</code>s are being queued and due to which the responses are extremely slow.
  How can I multi-thread <code>exec()</code> to solve this?</p>