
Lydia Hallie
Lydia Hallie is a software engineer, consultant, and educator with expertise in JavaScript, ECMAScript standards, and modern web development frameworks. She specializes in performance optimization, scalable architecture, and breaking down complex programming concepts into clear, visual explanations. Through a combination of hands-on engineering and in-depth technical educational content, she helps developers master advanced concepts.
React Compiter Internals
React Summit 2025

Upcoming
React Compiter Internals

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!
Exploring the TypeScript-first architecture of modern frameworks
TypeScript Congress 2023

25 min
Exploring the TypeScript-first architecture of modern frameworks

TypeScript goes beyond annotating syntax. We’ll explore how modern frameworks leverage type-safety at the project-level to empower better architecture, greater stability, and higher velocities.