how many threads does node js use

Node.js runs JavaScript code in the Event Loop (initialization and callbacks), and offers a Worker Pool to handle expensive tasks like file I/O. Node.js scales well, sometimes better than more heavyweight approaches like Apache. The secret to the scalability of Node.js is that it uses a small number of threads to handle many clients. If Node.js can make do with fewer threads, then it can spend more of your system's time and memory working on clients rather than on paying space and time overheads for threads (memory, context-switching). But because Node.js has only a few threads, you must structure your application to use them wisely.

Here's a good rule of thumb for keeping your Node.js server speedy: Node.js is fast when the work associated with each client at any given time is "small".

This applies to callbacks on the Event Loop and tasks on the Worker Pool.

View another examples Add Own solution

4.29

Modrobert 130 points

                                    Example 2: Partitioned average, each of the n asynchronous steps costs O(1).

function asyncAvg(n, avgCB) {
  // Save ongoing sum in JS closure.
  var sum = 0;
  function help(i, cb) {
    sum += i;
    if (i == n) {
      cb(sum);
      return;
    }

    // &quot;Asynchronous recursion&quot;.
    // Schedule next operation asynchronously.
    setImmediate(help.bind(null, i+1, cb));
  }

  // Start the helper, with CB to call avgCB.
  help(1, function(sum){
      var avg = sum/n;
      avgCB(avg);
  });
}

asyncAvg(n, function(avg){
  console.log('avg of 1-n: ' + avg);
});
You can apply this principle to array iterations and so forth.

Thank you! 7

4.29 (7 Votes)

Are there any code examples left?

Find Add Code snippet

New code examples in category Javascript

Javascript 2023-04-21 22:52:36
Javascript 2022-03-27 22:25:20 javascript download string as file
Javascript 2022-03-27 21:40:22 sort numbers in array javascript
Javascript 2022-03-27 21:20:04 compare two arrays and return the difference javascript
Javascript 2022-03-27 21:15:02 javascript regex french phone number
Javascript 2022-03-27 21:05:03 cypress custom error message
Javascript 2022-03-27 21:00:05 create element javascript with id
Javascript 2022-03-27 20:40:57 feather icons react
Javascript 2022-03-27 20:20:01 how to make graphql request in axios
Javascript 2022-03-27 20:15:07 bootstrap validator password and confirm password

Create a Free Account

Unlock the power of data and AI by diving into Python, ChatGPT, SQL, Power BI, and beyond.

Develop soft skills on BrainApps

Complete the IQ Test

Relative searches

how many threads does node js use

Welcome Back!

Create a Free Account