Optimizing React Native: 16 Performance Issues You’re Probably Facing
Article Summary
Most React Native performance problems aren't framework issues. They're developer knowledge gaps that compound over time.
Jamon Holmgren breaks down 16 common performance culprits he sees when clients complain about React Native apps running slow. The list reveals that most issues stem from basic React principles and lack of measurement, not the framework itself.
Key Takeaways
- Massive unnecessary rerenders from ignoring basic React principles top the list
- Missing basic config like cache and inline requires kills performance
- Loading spinners for short waits actually increase perceived slowness
- Heavy native modules loading at app start slow down launch times
- Waiting for all API requests before rendering creates unnecessary delays
React Native performance depends on developer knowledge and measurement practices, not native versus cross-platform debates.
About This Article
Apps often load heavy native modules at startup, even ones that users rarely need. This causes unnecessary delays to initial launch time and hurts the user experience.
Jamon Holmgren suggests using TurboModules to delay loading non-critical native modules. Instead, initialize them only when users actually need them.
When you defer heavy native module initialization, the app starts faster and renders sooner. Users see better performance on their first launch.