Reassure keeps
your components fast
Reassure is an open-source tool for testing performance regressions of React components in your React and React Native apps. It integrates with your existing test suite and CI to surface meaningful changes—before your users feel them.
Performance regressions
don’t announce themselves
Reassure helps you catch them early by tracking how your React components render over time. No guesswork, no manual profiling—just real, test-based insights that run on your own infrastructure.
With Reassure, performance becomes part of your workflow. You get clear, actionable signals when a component starts to slow down, before it reaches production.
Manual checks won’t scale
Keeping React Native apps fast takes more than occasional profiling. You need to know how changes impact render performance, commit by commit. Manual methods are slow, inconsistent, and easy to misinterpret.
Performance regressions often slip through, only to be caught during QA or, worse, by your users.
Based on internal experience across 100+ projects, we’ve found that around 80% of React Native performance issues come from unnecessary re-renders. That’s why Reassure focuses on the JavaScript side, where bottlenecks are easiest to surface.
We can help you move
it forward!
At Callstack, we work with companies big and small, pushing React Native everyday.
React Native Performance Optimization
Improve React Native apps speed and efficiency through targeted performance enhancements.
Monitoring & Observability
Enable production-grade monitoring and observability for React Native apps with real-time insights and alerts.
Release Process Optimization
Ship faster with optimized CI/CD pipelines, automated deployments, and scalable release workflows for React Native apps.
React Compiler Implementation
Use React Compiler to achieve instant performance benefits in your existing applications.
Ready to try Reassure yourself?
Explore the code, read the docs, and start testing performance in your project.
Learn more about performance
Explore insights on measuring, analyzing, and improving performance across React and React Native applications.
