React 19 Compiler : Automatic Optimisations vs React 18 Manual Memoization | React 19 Features

🚀 React 19 introduces a game-changing Compiler that automatically optimizes your components — no more manually wrapping everything in React.memo, useCallback, or useMemo!

In this video, we break down:
🔍 The core difference between React 18 and React 19 optimization techniques
⚡ How the React Compiler automatically improves performance
✅ When and why you no longer need to use memo, useCallback, or useMemo manually
🧠 A quick recap of React 18's manual optimization strategies
📊 Real-world code comparisons and benchmarks

GitHub Implementation - https://github.com/vbothe91/react-19-features/tree/main/1.%20React%20Compiler

Timestamps:
00:00 - Introduction
01:38 - React Compiler
05:00 - React 18 Project
08:11 - React.memo()
13:41 - useCallback()
16:14 - useMemo()
17:52 - React 19 Project
19:20 - React 19 automatic optimization

Playlist - https://youtube.com/playlist?list=PLrJ-e9wsoQTGcdmhsWFyFCi1MD5rK8YFr&si=dGodmQouh1a0V0R9

Next Video - https://youtu.be/Gwy6ZgCfjLo?si=oJYmL0Ehf0kZyPcJ

Whether you're upgrading or just learning, this video is perfect for understanding how React 19 simplifies writing high-performance apps.

📌 Subscribe for more videos in our full React 19 Features Playlist covering Actions, Server Components, Optimistic UI, and more!

Видео React 19 Compiler : Automatic Optimisations vs React 18 Manual Memoization | React 19 Features канала Frontend Devs