fork example

child.js

const minimist = require('minimist')

const args = minimist(process.argv)

switch (args.name) {
  case 'slave':
    console.log('Doing things in the slave')
    startSlave()
    break
  default:
    console.log('Doing thins in the other thing')
    startThing()
}


function startSlave () {
  setInterval(function () {
    process.send({ value: Math.random() })
  }, 1000)
}

function startThing () {
  setInterval(function () {
    process.send({ value: Math.random() })
  }, 1000)
}

master.js

const { fork } = require('child_process')

const workers = [ 'slave', 'thing', 'thing' ]

workers.forEach(function (w) {
  ps = fork('./child.js', ['--name', w])
  ps.on('message', function (msg) {
    console.log(`Received from ${w} - ${msg.value}`)
  })
})