As JavaScript developers, we spend a lot of time optimizing React components, fine-tuning re-renders, and squeezing every bit of performance out of our code. But what if I told you that some of the biggest performance wins aren’t in your JS at all?

CSS can have a huge impact on how fast and smooth your app feels - especially when it comes to animations, transitions, and rendering performance. In this talk, we’ll explore how the browser processes styles, why some CSS properties can block your UI thread, and how leveraging GPU-accelerated techniques can make everything feel effortlessly smooth.

We’ll break down real-world cases where CSS caused performance bottlenecks in React apps, and how small tweaks - without touching your JavaScript - unlocked massive improvements in responsiveness and animation speed.

What you’ll take away:
✅ How inefficient CSS can slow down your React components (and how to fix it)
✅ Why offloading work to the GPU makes your UI feel snappier
✅ Simple CSS optimizations that eliminate jank without touching your JS
✅ Real-world lessons from debugging slow animations and sluggish interactions

If you’re a React developer who wants your app to feel as fast as it runs, this talk will change the way you think about CSS performance.