Improve application performance with React Compiler
React Compiler rewrites components for speed—automatically. We’ll help you implement it correctly so your app gets measurable gains in startup time and render performance.
Why you should enable React Compiler
React Compiler brings static analysis to your codebase, optimizing React components at build time.
Automatic optimization
The compiler handles memoization decisions at build time by analyzing data flow, removing the need for manual profiling or heuristics in your code.
Automatic optimization
The compiler handles memoization decisions at build time by analyzing data flow, removing the need for manual profiling or heuristics in your code.
Better performance
By avoiding redundant renders and skipping unnecessary calculations, the compiler boosts performance without the runtime cost of manually added optimizations.
Better performance
By avoiding redundant renders and skipping unnecessary calculations, the compiler boosts performance without the runtime cost of manually added optimizations.
Simplified codebase
You no longer need to manually wrap components or hooks to improve performance. This keeps your codebase lean, easier to maintain, and aligned with React best practices.
Simplified codebase
You no longer need to manually wrap components or hooks to improve performance. This keeps your codebase lean, easier to maintain, and aligned with React best practices.
Instant performance improvement in an existing React Native app
Enabling React Compiler in a production app for one of our clients provided immediate performance improvement, while removing existing manual optimizations.
What should you look out for when using React Compiler?
React Compiler unlocks significant performance improvements by optimizing component rendering—but it also introduces new constraints that shape how you write and debug code. Knowing what changes and where limitations lie is essential to adopting it effectively at scale.
Rules of hooks
Only code that fully adheres to the Rules of Hooks is eligible for optimization—ensuring consistent behavior but requiring cleaner, more stable dependencies.
Unexpected runtime behavior
Optimizations may expose underlying violations—sometimes resulting in edge-case bugs like infinite loops or incorrect renders that are harder to trace.
Non-trivial setup
Enabling the compiler involves Babel and ESLint configuration, with additional complexity in monorepos or advanced build pipelines like Webpack or Metro.
React 19+
The compiler is designed for React 19 and newer. Backporting to earlier versions introduces polyfill requirements and potential conflicts with third-party libraries.
Partial coverage
Improvements focus on component-level memoization. Shared logic, utility functions, and non-React code paths remain unaffected.
Debugging tradeoff
Once compiled, the transformed output might not match your original source. Debugging may require deeper understanding of memoization and React internals.
Measure performance impact of React Compiler with our open-source library
Reassure is a performance testing library for React Native that helps you measure performance at component. By comparing render durations between versions, it ensures performance stays consistent—especially after refactors or updates.
- Component-level render measurement with statistical diffing to highlight meaningful performance changes
- First-class CI support with auto-generated scripts for popular providers
- Flexible APIs to measure render time, sync/async functions, and define custom interaction scenarios
Improve performance of your frontend with React Compiler
Enable React Compiler for your application
Integrate React Compiler into your project safely—handling all necessary build configuration, dependencies, and feature flags—so you can start benefiting from automatic performance optimizations.
Expand React Compiler to all components
Identify and refactor unsupported patterns to ensure all components are compatible with the React Compiler.
Remove redundant memoization and other outdated performance optimizations
Clean up legacy performance workarounds—like overused useMemo, React.memo, and useCallback—to avoid conflicts and simplify your codebase.
Get React Compiler up and running in a week!
Why leading companies work with Callstack
Meta Official Partners
We are official Meta partner for React Native, co-organizers of React Conf and hosts of React Universe Conf.
Working at scale
We know how to make React Native work at enterprise scale, both technically and organizationally.
React Native Core Contributors
We don’t just use React Native to build cross-platform apps, we help shape it for millions of developers.
Team at scale
We’re a team of 200+ engineers ready to start fast and scale with your needs.
Enterprise-friendly
We hold ISO certifications and follow strict security standards to make onboarding smooth and compliant.
Wide range of services
As a partner for your full application lifecycle, we offer a full range of services around React and React Native.
FAQs
While powerful, React Compiler comes with new requirements that teams should understand before adopting. That’s why we’ve gathered the answers to the most common questions we get when helping teams enable and scale React Compiler across their codebase.
React Compiler applies memoization only when it’s beneficial—unlike manual useMemo or useCallback, which can sometimes degrade performance if overused. It analyzes code statically to make smarter decisions.
No. The compiler skips any code that doesn’t follow React’s rules or that it can’t safely optimize. It continues compiling supported components while leaving others untouched.
Yes. The compiler supports gradual adoption. You can enable it for selected components or files and expand as needed once you’ve validated the impact.
Not necessarily. In most cases, you don’t need to refactor your code. However, following standard React rules like using hooks consistently makes it easier for the compiler to optimize.
The compiler will skip those specific patterns and continue compiling the rest. You can still benefit from partial optimization and revisit unsupported code later.
React Compiler operates at build time and automates optimizations like memoization and referential equality tracking. Unlike runtime tools, it doesn’t add overhead to your app during execution.
Yes. React Compiler is used internally at Meta and has been battle-tested across complex applications. It’s designed to work reliably in real-world production environments.
Interested in React Compiler and performance optimization?
Start with a proof-of-concept and see how React Compiler improves responsiveness and simplifies your code. Let’s talk about how it could work in your application.
