---
title: "Comment by Mm Cc on \"Why Your Node.js App Freezes (And How Worker Threads Can Save You)\" | Hashnode"
description: "This happened to my team with a PDF generation endpoint. We kept explaining the \"single-threaded event loop\" but the business just saw a frozen UI. Implementing"
url: "https://hashnode.com/posts/why-your-nodejs-app-freezes-and-how-worker-threads-can-save-you/68018214a7e17df949bc335d/comment/69e068d2ec91693380578d3b"
---

[Discussion](https://hashnode.com/posts/why-your-nodejs-app-freezes-and-how-worker-threads-can-save-you/68018214a7e17df949bc335d)

Comment [Why Your Node.js App Freezes (And How Worker Threads Can Save You)](https://hashnode.com/posts/why-your-nodejs-app-freezes-and-how-worker-threads-can-save-you/68018214a7e17df949bc335d)

[Mm Cc](https://hashnode.com/@mmcc)

[Apr 16](https://hashnode.com/posts/why-your-nodejs-app-freezes-and-how-worker-threads-can-save-you/68018214a7e17df949bc335d/comment/69e068d2ec91693380578d3b)

This happened to my team with a PDF generation endpoint. We kept explaining the "single-threaded event loop" but the business just saw a frozen UI. Implementing Worker Threads for that specific heavy task was the perfect surgical fix, just like you described.