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!
This talk has been presented at React Summit 2025, check out the latest edition of this React Conference.
