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TOPIC OVERVIEW

nodejs/Worker Threads

Run CPU-heavy JavaScript work away from the main thread without blocking your Node.js application.

15 QuestionsAdvancedHigh Priority ~12 min read

Node.js is excellent at handling I/O-heavy workloads, but CPU-intensive JavaScript can still block the main thread. Worker Threads allow you to run JavaScript in separate threads so expensive calculations can happen without stopping the main event loop.

Workers can communicate with the main thread by sending messages and can also share memory when needed. They are useful for tasks such as CPU-heavy calculations, data processing, and other workloads that would otherwise keep the event loop busy.

What you'll walk away knowing

Why CPU-heavy work can block Node.js
How Worker Threads run JavaScript in separate threads
How workers communicate with the main thread
When Worker Threads are better than normal asynchronous APIs
1What are worker threads?Intermediate2How to use worker threads?Intermediate
All Topics
1
Basics
Event Loop
Modules
2
Buffers
Streams
Events
File Operations
Time functions
3
Worker Threads
Threads
Clusters
4
Performance Optimisation
Websockets
Crypto
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