NodeJs how to create a non-blocking computation

Question

I am trying to get my head around creating a non-blocking piece of heavy computation in nodejs. Take this example (stripped out of other stuff):

http.createS         


        

Answer 1

We (Microsoft) just released napajs that can work with Node.js to enable multithreading JavaScript scenarios in the same process.

your code will then look like:

var napa = require('napajs');

// One-time setup. 
// You can change number of workers per your requirement. 
var zone = napa.zone.create('request-worker-pool', { workers: 4 });

http.createServer(function(req, res) {
    console.log(req.url);

    zone.execute((request) => {
        var result = null;
        // Do heavy computation to get result from request
        // ...
        return result;
    }, [req]).then((result) => {
        res.end(result.value);
    }
}).listen(8080, function() { console.log("ready"); });

You can read this post for more details.