- JS-based Jank & FPS Detection: Real-time detection and visualization of UI jank (frame drops) and frame intervals (FPS) using the JavaScript thread. Not native FPS.
- TTI Measurement (JS-based): Accurately measure Time To Interactive (TTI) for any synchronous task using InteractionManager and high-resolution timers, all on the JS thread.
- Frame Graph & Jank Simulation: Visualize frame interval trends and simulate various levels of JS thread blocking to test app responsiveness.
- Context API Integration: Access frame/jank data anywhere in your app via React Context.
- Example App: Full-featured example app included for quick start and demonstration.
- All measurements are JS thread-based. This library does NOT measure native FPS or native TTI. It is designed for diagnosing JS-side performance issues in React Native apps.
- See README.md for detailed architecture diagrams, usage, and API docs.
yarn add react-native-jank-tracker
# or
npm install react-native-jank-tracker- GitHub: https://github.com/zereight/react-native-jank-tracker
- See the "How it works / Architecture" section in the README for detailed explanations and diagrams.
Initial public release.