React Compiler is an experimental compiler that automatically optimizes React apps. It is a build-time-only tool that works with plain JavaScript. React Compiler understands the Rules of React, so developers don't need to rewrite any code to use it. The compiler also includes an eslint plugin that surfaces analyses from the compiler inside editors. React Compiler is still new and not yet fully ready for production.

React Compiler is an experimental tool that aims to automate the memoization of components and dependencies Initial tests on simple examples showed promising results, with the Compiler successfully eliminating unnecessary re-renders. However, when applied to real-world applications, the Compiler struggles with complex scenarios and requires developers to have a deep understanding of memoization techniques and React's internal workings to make necessary code adjustments for optimal Compiler results.