---
title: "Comment by For sell Mx 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/69cb846e4fd3e5d198de458d"
---

[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)

[For sell Mx](https://hashnode.com/@mxsell)

[Mar 31](https://hashnode.com/posts/why-your-nodejs-app-freezes-and-how-worker-threads-can-save-you/68018214a7e17df949bc335d/comment/69cb846e4fd3e5d198de458d)

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 one heavy function was a game-changer for user perception.