Node.js Event Loop Efficiency

Today's chai code class was about node js internals We learned a bit about how Node.js works behind the scenes, but it was a lot to grasp! 1. Event Loop: How Node.js handles tasks one by one 2. Async behavior: Lets apps run fast without getting stuck 3. Timers & callbacks: Basics of how things happen in order  I’ll be learning more and sharing a detailed post on Node.js internals soon! Thanks to our teacher Piyush Garg for guiding us through this complex topic! #NodeJS #JavaScript #LearningJourney #BackendDevelopment #TechLearning #chaicode Hitesh Choudhary Anirudh J.Akash Kadlag

Node.js is dying Most devs think replacing it with Bun is a no-brainer due to its 5x throughput boost. But what they miss is that this shift also means relearning entire ecosystems and toolchains. Can we really afford to ditch the massive Node.js community for a speed bump? . . . . #MERNstack #Nodejs #Bun #JavaScript #DevDebate

🚀 Today I learned something really interesting about the Node.js Event Loop. I always assumed the event loop behaves the same everywhere, but it actually works differently in the Browser vs the Node.js environment. In Node.js, the event loop goes through multiple phases such as: • Timers (Expired Callbacks) • I/O Polling • setImmediate • Close Callbacks Understanding these phases really helped me see how asynchronous operations are scheduled and executed under the hood. It also made me realize how important it is to understand core fundamentals, not just frameworks. The deeper you go into JavaScript, the more fascinating it gets. ⚡ Thanks Piyush Garg and Hitesh Choudhary for such a great explanation. #NodeJS #JavaScript #BackendDevelopment #LearningInPublic #EventLoop

While working on a full-stack project with Next.js, I sometimes needed to quickly check environment variables without modifying the code. Here’s a simple way to do it directly from the terminal (required 'dotenv' library): Check env value: node -e "require('dotenv').config(); console.log(process.env.DATABASE_URL)" It’s a small tip, but quite useful when you want to check env value. I’ll probably share a few more small things like this from my project along the way. #nextjs #nodejs #dotenv #webdevelopment #softwareengineering #buildinpublic #javascript #devtips #webdevUK

🚀 What I Learned Today: Node.js Internals • Node.js runs JavaScript on a single main thread • Top-level code executes first before the event loop starts • Import statements load during initialization • Event Loop manages asynchronous operations Event Loop Phases: • Timers → setTimeout() / setInterval() • I/O Polling → file system & network operations • Check → setImmediate() (Node.js specific) • Close Callbacks → cleanup tasks • Node.js uses a libuv worker thread pool (default: 4 threads) • Thread pool size can be changed using process.env.UV_THREADPOOL_SIZE https://lnkd.in/gwFG5WVW thank you Piyush Garg sir Hitesh Choudhary sir Akash Kadlag sir #chaiaurcode #NodeJS #JavaScript #Backend #EventLoop

Excited to share a new episode of Beyond Node.js ✨🎉 This time, we sit down with Ulises Gascón — TC39 delegate and maintainer of widely used JavaScript tools — to talk about what actually matters in production. We cover: • The worst things seen in real Node.js applications • Common misconceptions about Node.js in production • What teams should really focus on If you're working with Node.js in production, this conversation is for you. Watch the full episode in the comments 👇🏼 #Nodejs #JavaScript #Backend #SoftwareEngineering #OpenSource

I just deleted 30 lines of code from a React component. no refactor. no library. just one hook in React 19. it's called use() — and it changes how you handle async data and context in your components. most devs haven't heard of it yet. swipe through ↓ broke it down simply what's the most boilerplate you've deleted in a single React upgrade? 👇 #react #react19 #javascript #webdev #frontend

Today Class was on Internals of Node.js! Understood how Node.js runs on a single main thread, uses the event loop to handle async tasks, and a thread pool (default 4 threads) for heavy operations. Also learned how phases like I/O polling, expired callbacks, and setImmediate work behind the scenes. Really interesting to see how Node.js executes code internally. #NodeJS #NodeJSInternals #JavaScript #EventLoop #ChaiCohort26 #Chaicode Hitesh Choudhary Chai Code #piyushgarg Anirudh Jwala Akash Kadlag Jay Kadlag JavaScript

💻 JS Global Scope: Browser vs Node.js Browser: window is global Node.js: each file is a module; use global for true globals Simple, but knowing this avoids bugs when switching between frontend & backend! 🚀 #JavaScript #NodeJS #WebDev #CodingTips

Day 2 🚀 It’s working. From idea → to a working CLI that sets up my full stack in one command ⚡ What it does: • Creates frontend/ (Next.js) • Creates backend/ (Express + MongoDB ready) • Sets up basic structure + routes Run once → start coding instantly. Next step: Publishing it as an npm package 📦 Turning a repetitive problem into a real tool feels 🔥 Would you use something like this? #BuildInPublic #JavaScript #NextJS #NodeJS #CLI