#event-loop articles

Go Concurrency Under the Hood - Goroutines

When you first start with Go from the Node.js world, all the cool async I/O with an event loop seems to be missing. You just write this "I/O blocking" code exactly like a synchronous procedure call: q

wpding.hashnode.dev

Abdul RahmanOct 7 · 8 min read

Behind the Gate: What Node.js Really Does When You Run node app.js

Introduction We use Node.js every day. We write node app.js and our code runs. But if somebody asks "what is happening behind the scene?", very few developers know the answer. For most of us, Node.js

blog.abdulrdeveloper.me

Sahil NasariwalaSep 28 · 4 min read

setTimeout(0) Is Lying to You (and the Event Loop Can Prove It)

Quick test. No running it, no Googling. What does this print? console.log('start'); setTimeout(() => { console.log('timeout'); }, 0); Promise.resolve().then(() => { console.log('promise'); });

jsvisualized.hashnode.dev

Alok RajJul 31 · 6 min read

The Node.js Event Loop Explained

There is a peculiar truth about Node.js that surprises many developers the first time they hear it. It has one main thread. Just one. It actually in a more efficient manner. It simply works smarter. A

node-js.hashnode.dev

Srekaravarshan N KJul 11 · 28 min read

Part 6: Microtasks and Why Two Queues

What no one teaches you about the JavaScript Event Loop — Part 6 of 8 A puzzle, slightly harder Promise.resolve().then(() => { console.log('1'); Promise.resolve().then(() => console.log('2'))

srekaravarshan.hashnode.dev

Shubham Kumar SinghJul 3 · 5 min read

How I Solved the Ordered Parallel Batcher Problem in JavaScript

Every coding problem teaches you something new. Recently, I worked on an interesting asynchronous JavaScript interview question called Ordered Parallel Batcher. At first, I thought the solution would

shubhamsinghbundela.hashnode.dev

PranavJun 25 · 11 min read

JavaScript Runtime Secrets: The Call Stack, Browser APIs, and Microtask Priority

Understanding Asynchronous JavaScript: How JavaScript Handles Multiple Tasks Without Blocking ⏱️ Read Time: ~15 mins | 🎯 Level: Beginner to Advanced ⚡ TL;DR (Quick Summary) JavaScript is single-th

promises-async-await.hashnode.dev

Gidudu NicholasJun 25 · 21 min read

Advanced Dart: Learn Asynchronous Programming with Streams, Isolates, and the Event Loop

I had been writing Flutter apps for over a year before I actually understood how Dart handles concurrency. I knew how to use await. I knew FutureBuilder and StreamBuilder well enough to get things wor

freecodecamp.org

S M Piyas Mahamude AlifJun 24 · 19 min read

Node.js Thread Pool Under the Hood The Secret Engine Behind libuv's Architecture, Scheduling, Optimization, and High Concurrency

Introduction: The Lie You Were Told Every Node.js tutorial opens with the same sentence: "Node.js is single-threaded." It is a sentence that is both true and wildly misleading at the same time. Yes,

techopinion.hashnode.dev

Srekaravarshan N KJun 17 · 37 min read

Part 3: Where Threads Sleep

What no one teaches you about the JavaScript Event Loop — Part 3 of 8 A different puzzle In Part 2 we left a question hanging. An idle browser tab uses zero CPU. Open your task manager — a tab with n