multiple threads in a NodeJS application

threaddemo.js

'use strict';

const args = process.argv;
const cluster = require('cluster');

function getThreads() {
  let threads = 1;
  let tag = args.indexOf('--threads');
  if (tag > 0) {
    let newThreads = parseInt(args[tag + 1], 10);
    if (newThreads > threads) {
      threads = newThreads;
    }
  }
  return threads;
}

function start(worker) {
  console.info(`Starting application. Worker ${worker.id}.`);
  setTimeout(() => {
    worker.disconnect();
  }, 1000);
}

if (cluster.isMaster) {
  let threads = getThreads();
  console.info(`Number of threads: ${threads}`);
  for (let i = 0; i < threads; i++) {
    cluster.fork();
  }
}
else {
  start(cluster.worker);
}