React Native Performance: Profile the Slow Interaction
A list stutters and the team assumes every render is expensive. This guide gives you a small, testable way to approach the issue before changing a live system.
A practical workflow
- Profile the interaction in a release-like build and identify expensive rendering or bridge work.
- Virtualize long lists and memoize only components shown to be costly.
What to check
Debug builds can exaggerate latency; compare on representative devices. Compare the result with the original problem and record what changed. If a measurement or test does not support the change, revisit the assumption rather than adding more complexity.
Keep the experiment small enough to reverse. Document the starting state, the change and the result so another person can repeat the process. Product menus and versions can change, so check the current documentation for your environment.
Official reference: Read the documentation.