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# Node.js: More Threads Than You Think


- **Date:** Thursday, Jul 10, 2025
- **Time:** 15:30–16:00 (30 min)
- **Room:** Stage 9
- **Event:** World Congress 2025
- **Tags:** javascript, node.js, performance

## Description

Node.js was announced in 2009 as a single-threaded JavaScript runtime. In 2018, it became multi-threaded, and no one noticed.

What can worker_threads do? What are they useful for? What's the best way of communicating between two threads? How can you leverage multi-threading to improve the performance of your application? How can we make a thread wait for another?

In this session, we will cover the key Node.js APIs and then discuss some useful techniques and ecosystem modules that you can start using today.

## Speaker

### [Matteo Collina](https://www.wearedevelopers.com/@matteo-collina)

Platformatic Co-Founder and CTO, Node.js TSC member, Fastify Lead Maintainer


## Related talks at this congress

- [Multithreaded Node.js](https://www.wearedevelopers.com/events/world-congress-2025/sessions/731-multithreaded-node) — Matteo Collina
- [Multithreading in Javascript: A guide to Web Workers](https://www.wearedevelopers.com/events/world-congress-2025/sessions/741-multithreading-in) — Dani Coll
- [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/events/world-congress-2025/sessions/782-streaming-ai) — Ahmed Megahd
- [Marko.js: Unsung Hero of Scalable Web Frameworks](https://www.wearedevelopers.com/events/world-congress-2025/sessions/848-marko-js-unsung-hero) — Eugene Fidelin