Animation Performance
Smooth animations are essential for a polished user experience, but poorly implemented animations can cause noticeable jank, especially on lower-end devices. This tutorial covers key animation performance optimization techniques.
Always Use the Native Driver
Prefer Reanimated for Complex Animations
Since Reanimated runs animation logic entirely on the native thread through worklets, it consistently outperforms the standard Animated API for complex, gesture-driven, or frequently updating animations.
Avoid Animating Layout Properties Directly
Animating properties like width or height directly can trigger expensive layout recalculations. Where possible, prefer animating transform properties like translateX, translateY, or scale instead.
Avoid Running Animations During Heavy JavaScript Work
Animations relying on the JavaScript thread can stutter if heavy synchronous JavaScript work runs simultaneously. Native-driven or Reanimated worklet-based animations avoid this issue entirely.
Reduce the Number of Simultaneously Animating Elements
Animating too many elements at once, especially with complex styles or shadows, can overwhelm the native rendering pipeline, causing dropped frames.
Test on Real, Lower-End Devices
Animations that appear smooth on a high-end development device may stutter noticeably on lower-end hardware, making real device testing essential for animation-heavy features.
Profiling Animation Performance
Use the Perf Monitor overlay and native profiling tools to check whether both the JavaScript and UI thread frame rates remain close to 60fps during animations.
Conclusion
Following these animation performance best practices, particularly leveraging the native driver and Reanimated worklets, ensures your React Native animations remain smooth across a wide range of devices.
