useDeferredValue is one of the most underrated React hooks. It allows us to dramatically improve the performance of our applications in certain contexts. I recently used it to solve a gnarly performance problem on this blog, and in this tutorial, I'll show you how! ⚡

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Josh W Comeau

Learn how to optimize the performance of React applications using the useDeferredValue hook. Understand the problem of re-rendering the code snippet in the UI and the concept of high-priority and low-priority areas in UI optimization.

Snappy UI Optimization with useDeferredValue

Link to this heading Introducing useDeferredValue

Link to this heading A world of difference

Your post about useDeferredValue was amazing! The way you explained how to solve performance issues using this React tool was very clear. I especially liked the example of the Shadow Palette Generator, showing how to divide the UI into high and low priority areas to update what matters first.
The tips about memoizing components and loading indicators were very helpful. I also found the React 19 feature for speeding up initial rendering interesting.
Congratulations on the detailed and informative post!

You’re such a good communicator and educator. You’ve made me hyped to use a hook I’d never considered using before.

I absolutely loved the timeline component for it made things so clear to grasp that I didn’t even need to read your instruction to take time and understand what’s actually happening with useDefferedValue hook.
It felt like I was enlightened instantly.
I’m sure it was non-trivial to craft it. Thanks for the post. It was a pleasure to read.