Worker Threads in Node.js: A Complete Guide for Multithreading in JavaScript
--- By offloading CPU-heavy operations to worker threads, you can keep your Node.js applications responsive, scalable, and performant—even under heavy load. Getting Started with Worker Threads The worker_threads module is built into Node.js, so you don’t need to install anything extra. To use it, you simply import the module and create a new instance of Worker to run code in a separate thread. Let
Introduction to Event Loop Utilization in Node.js
In the last year, I've spent many hours writing patches for libuv and Node to collect new metrics. The goal of this was to indirectly infer the state of the application without introducing measurable overhead. I've run a few hundred hours of benchmarks and collected over one million data points to make sure my analysis was correct. Eventually, I plan to write about all aspects of my research, but
Understanding Streams in Node.js
Streams in Node.js have a reputation for being hard to work with, and even harder to understand. In the words of Dominic Tarr: “Streams are Node’s best and most misunderstood idea.” Even Dan Abramov, creator of Redux and core team member of React.js is afraid of Node streams.  This article wi
Understanding Worker Threads in Node.js
To understand Workers, first, it’s necessary to understand how Node.js is structured. When a Node.js process is launched, it runs: One process One thread One event loop One JS Engine Instance One Node.js Instance One process: a process is a global object that can be accessed anywhere and has information about what’s being executed at a time. One thread: being single-threaded means that only one se
How to Start Contributing to Node.js
Getting into an open-source project can seem a bit overwhelming. Whether you're entirely new to open-source or not sure where your interests and skills could be helpful, it can be a hefty investment just to go and learn about a project before even thinking about contributing. Node.js is a pretty massive project, with a lot of hidden areas that may not be immediately obvious to someone trying to ge
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How Node.js Handles Async Operations
