Asynchronous Programming in Node.js: Callbacks, Promises, and Async/Await

A program that involves several processes to run simultaneously without having to wait for completion of execution for previous ones is called Asynchronous programming. When data driven tasks are done sequentially then it might spoil the user experience of the application as we have to wait long for fetching records in connected environment. In a synchronized and connected environment all the database is loaded on application and till that time it might make the application unresponsive. That is why for building fast performance applications in business we make use of Asynchronous programming in Node.JS. In this blog we will explain the benefits of using asynchronous programming in Node.js.

What is meant by Asynchronous Programming?

Business in modern times want to make use of high performance applications that is capable of performing critical tasks concurrently without waiting for program execution sequentially as in case of synchronous programming. Asynchronous programming is a way where many processes run using event loops and non-blocking I/O operations, rather than creating multiple threads. And we can set priorities in Node.js with event callbacks, promises, and more recently, Async/await syntax.

Why do we need Asynchronous Programming in Node.js?

Node.js is an open source JavaScript runtime environment where we can build high performance applications for real time data driven businesses. Banking, finance and trading platforms are usually built with the help of Node.js. The reason is because we can create event driven activities and manage them in accordance with user input. Not only is this we can ensure that single threaded applications capable of performing multiple tasks without interfering with the previous non executed or non executed tasks.

Tools developers use for Asynchronous Programming in Node.js


Developers use several tools for asynchronous programming in Node.js, each catering to different aspects of managing asynchronous operations. The foundational tools include callbacks, which allow functions to execute once an asynchronous operation completes, though they can lead to complex nested structures known as callback hell. To address this, developers use Promises, which provide a cleaner and more manageable approach to handling asynchronous tasks by enabling chaining and better error handling. Further simplifying asynchronous code, Async/Await, built on Promises, allows developers to write asynchronous code that looks and behaves like synchronous code, enhancing readability and maintainability. Additionally, libraries like async.js offer utility functions to streamline and control complex asynchronous flows, making it easier to manage concurrency, series, and parallel execution patterns.

Advantages of using Asynchronous Programming in Node.js


Asynchronous programming in Node.js offers significant benefits, primarily by enhancing the efficiency and scalability of applications. It allows the server to handle numerous simultaneous operations, such as network requests and file I/O, without blocking the main execution thread. This non-blocking nature ensures that Node.js can manage high volumes of requests with minimal resource consumption, leading to improved performance and faster response times. Asynchronous programming also enhances the user experience in real-time applications, ensuring that processes run smoothly and without delays. By efficiently utilizing system resources and maintaining responsiveness, asynchronous programming is fundamental to building high-performance, scalable Node.js applications.

Applications of Asynchronous programming in Node.js


Create and manage Web server and API

With the help of Node.JS we can create web servers where we can host files and access website globally. We can also create API where we can communicate with other application database and fetch the required information and present them in a desired format to perform data analytics tasks. The web server can be scaled up to fit any business size or team composition. This means that if there is unusual traffic on website, or too many users accessing web based applications we can manage them efficiently with concurrent server requests with the help of asynchronous programming in Nodejs.

Real time or live streaming applications

We can build applications that allow users to upload media files like audio or video and once they are uploaded we can customize the file name, add description about the video and allow visitors to view them after subscription to web based application. We can analyze the viewership, total page views, and number of times videos are watched through single unified portal.

Microservices architecture

For a mid scale and large scale enterprise where there are many departments and every departments store tremendous amounts of data we can build microservices application for each department where they have independent database on server and they do not have to be connected to main single database. This helps in improving the performance of the large scale business applications.

Data intensive applications

For data driven businesses we need to empower businesses by integrating data engineering applications in software. This helps in improving the data quality, and reliability of data. Nodejs applications allows us t perform data intensive tasks efficiently.

Single page applications

At times we need to analyze dynamic data on a single page application so that we can have an overview of the business activities from one page screen. This helps in improving user experience and reduces the time in finding resources from bulky websites with too many features.

Serverless computing applications

Since the computation works are done in Nodejs runtime environment and not on the server hence it reduces the server execution time, and improves the performance of the application making it faster to access data from the server.

To sum up we must say that we must select the best offshore Nodejs development company who understand the unique business needs, analyze the data risks involves, and formulate plans for developing web based solutions that allows us to perform business activity, improve business efficiency, automate repetitive work, and optimize data for improving data processing speed. Asynchronous programming in NodeJS allows us to perform serverless computing which makes the application fast, easy to be accessed on any device without any compatibility issues. We can perform data intensive task with the help of asynchronous programming techniques of NodeJS. For applications that require live streaming of data in the form of videos or audio we need web based application which can be built on NodeJS platform with ease.

E-mail me when people leave their comments –

Symon Shilton is a passionate guest blogger and content curator who loves to write on trending Tech related topics like Nodejs development, Java development, python development and wordpress development.

You need to be a member of CISO Platform to add comments!

Join CISO Platform

CISO Platform

A global community of 5K+ Senior IT Security executives and 40K+ subscribers with the vision of meaningful collaboration, knowledge, and intelligence sharing to fight the growing cyber security threats.

Join CISO Community Share Your Knowledge (Post A Blog)



CISO Breakfast at BlackHat Las Vegas 2024!

  • Description:

    We are thrilled to invite you to the CISO Breakfast at BlackHat 2024. 

    CISOPlatform is a community partner for the event which is co-hosted by Silicon Valley Bank, Stage One, First Rays Venture Partners, Latham & Watkins.


    Event Details: 

    • Date: Thursday, August 8th,…
  • Created by: pritha
  • Tags: blackhat usa, las vegas, ciso breakfast, usa