Tag: javascript

reduce const numbers = [10, 20, 30]; const sum = numbers.reduce((total, num) => total + num, 0); console.log(sum); // 60 fromEntries const obj = { a: 1, b: 2, c: 3 }; const transformed = Object.fromEntries(   Object.entries(obj).map(([key, value]) => [key, value * 2]) ); console.log(transformed); // { a: 2, b: 4, c: 6 }… Continue reading Some JavaScript functions that can significantly optimize the primitive approaches programmers might use for certain tasks:

n the world of Node.js, async/await has become a staple for handling asynchronous operations. It’s clean, easy to read, and feels synchronous. But as wonderful as it sounds, misusing async/await can introduce performance bottlenecks that slow down your application. If your app feels sluggish despite using async/await, this post is for you. Why Async/Await Feels Slow Under the hood,… Continue reading How Async/Await Can Slow Down Your Node.js App

Context There is a library that is used by all the services that is causing high memory usage and it involves redis (redis was included in the name of the library). The list of the services that were affected. Below is the dashboard that was linked to the ticket: Services were running on Kubernetes and… Continue reading Tracking down high memory usage in Node.js

WebSockets are essential for building real-time applications, enabling two-way communication between a client and a server. Whether you’re working on a chat app, stock market ticker, or a collaborative tool, WebSockets allow your server and client to stay connected and send data in real-time. As of 2024, Node.js continues to make it easier to work with WebSockets, especially with the… Continue reading Built-in WebSockets in Node.js

SQLite in Node makes it easier than ever to persist data with server-side JavaScript. Get started with the node:sqlite module. Credit: iStock Node 22.5.0 now bundles SQLite, a lightweight, in-process relational database that requires no additional infrastructure but packs considerable capability. Let’s get to know this handy new built-in feature in Node.js. What is SQLite? Relational databases are a… Continue reading Intro to Node’s built-in SQLite module

You’ve written and deployed your application and gathered users – congrats! But what’s next? Improvements, getting rid of bottlenecks, increasing execution speed, and more enhancements are in line. In order to make these improvements, you first have to be aware of your app’s existing performance characteristics. Only when you’ve identified the slow parts and the… Continue reading Node.js performance hooks and measurement APIs

▶️ Intro ⭐ What is OOPs ? Object-oriented programming is an approach to solving problems by creating objects . ⭐ 4 Pillars of OOP Terminologies in OOP Abstraction – Hiding internal details (show only essential info!) Encapsulation – The act of putting various components together (in a capsule) Inheritance – The act of deriving new things from existing… Continue reading OOPS in JS – Ultimate

In modern web applications, it is very common to have user authentication and authorization systems. These systems provide user-specific functionality and data, which requires that each user has a certain level of access and control over the resources they own. However, when these resources are accessed in a rapid and repetitive manner, it can lead… Continue reading How to Use express-rate-limiter to Limit User Rates in Node.js

Node.js is a powerhouse for building high-performance applications, but handling high traffic requires more than just writing JavaScript. As your application grows, so do the challenges — slow response times, server crashes, memory leaks, and scalability bottlenecks. If you’re running an API, a real-time chat application, an e-commerce platform, or a SaaS product with thousands… Continue reading High-Traffic Node.js: Strategies for Success