Execute a computing-intensive task in background

Question

I have a task that requires a lot of computing without IO while executing and I don\'t want to block thread while executing this task. How can I do this in Node.js

Answer 1

You need background workers and some kind of communication protocol between your web instance and worker instances. For example you can use kue to create tasks queue

// web worker
var kue = require('kue');
var queue = kue.createQueue();

....

app.post('/calculateSomeCrazyStuff', (req, res, err) => {
  queue.create('myLongRunningJobName1', {
    fibonacciSequence: 52
  }).save((err) => {
    if (err) {
      return next(err);
    }
    res.status(204).send();
  });
});



// jobs worker
var kue = require('kue');
var queue = kue.createQueue();


queue.process('myLongRunningJobName1', function(job, done) {
  // calculate fibonacci
  done();
});