Talk: Lydia Hallie - "React Compiler Internals", React Summit 2025 React Compiler was introduced back in 2024 as a way to automatically handle performance optimizations in your apps—but how does it work? In this talk, I’ll walk you through some of React Compiler’s internals. We’ll explore its full process, from parsing to Abstract Syntax Tree (AST) transformation, along with its key technologies, benefits, trade-offs, and a practical example of how it transforms your code to prevent unnecessary re-renders. The good news: you (luckily) don’t need to master its internals to integrate it into your codebase. That said, a solid grasp of its internals will significantly enhance your ability to apply the optimization techniques it unlocks! Watch the full talk with Q&A on GitNation website: https://gitnation.com/contents/react-compiter-internals Follow the link to watch the full version of all the conference talks, QnA’s with speakers and hands-on workshop recordings → https://gitnation.com/events/react-summit-2025 Timestamps: 00:00 React Compiler and Memoization 01:49 React Performance Optimization 03:41 Compiler Optimization Process 06:12 Single Static Assignment in Compiler 09:17 Compiler Effect Analysis and Reactive Detection 12:38 Compiler Scope Discovery and Code Generation 17:11 Compiler Memoization Optimization 🔥 Want to hear talks like this live? Join us at React Summit US 2025 in New York: https://reactsummit.us/?utm_source=youtube&utm_medium=lydiahallie React Summit on X: https://twitter.com/ReactSummit React Summit on Bluesky: https://bsky.app/profile/reactsummit.gitnation.org React Summit on LinkedIn: https://www.linkedin.com/showcase/reactsummit/ React Summit on Instagram: https://www.instagram.com/reactsummit/ GitNation on TikTok: https://www.tiktok.com/@gitnationorg #ReactSummit #ReactCompiler #GitNation #ReactSummit2025 #ReactJS #TechTalks