Mar 21, 2024

Optimizing React Native — Mastering Component Efficiency

This article breaks down the talk by Anshdeep Kaur, Software Developer at Engati Technologies, at the recent React Native Meetup held at GeekyAnts, Bengaluru.
Ahona Das
Ahona DasTechnical Content Writer

As React Native continues to rise in popularity, ensuring app efficiency and a seamless user experience becomes paramount. In this talk, we delve into why optimization is essential and explore various strategies to achieve it.

Why Optimization Matters

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With the increasing complexity of React Native apps, performance issues such as slow navigation, janky animations, excessive render times, and network bottlenecks become prevalent. These bottlenecks hinder user experience and can deter app success in the market. To address these challenges, optimizing performance across diverse devices and network conditions is crucial.

Strategies for Optimization

Let us take a quick look at the strategies discussed by Anshdeep for optimizing React Native.

  • Lazy Loading: Lazy loading enhances performance by deferring the loading of non-essential components until they are needed, thereby speeding up app startup and navigation.
  • Image Optimization: Optimizing images through techniques like lazy loading, compression, and caching reduces load times and data usage, enhancing overall app performance.
  • Code Splitting: Breaking down code into smaller bundles and loading only what is necessary improves app startup time and reduces bundle size, especially beneficial for large or modular applications.
  • Webpack and Repack: Utilizing tools like Webpack and Repack allows for efficient code splitting and chunk management, optimizing app loading and performance.
  • Efficient Virtualized Lists: Leveraging components like FlashList over FlatList optimizes performance, especially in low-end devices, by avoiding unnecessary state resets.
  • Hermes Engine: Utilizing Hermes garbage collection optimizes memory management, reduces runtime memory usage, and improves app responsiveness.
  • Runtime Optimization: Ahead-of-time compilation and bytecode precompilation reduce unwarranted re-renders, enhancing app performance.
  • Additional Strategies: Memoization, component optimization, state optimization, event handler optimization, and selective rendering further improve efficiency by minimizing unnecessary re-renders and optimizing resource usage.


Mastering component efficiency in React Native is essential for delivering high-performing apps with seamless user experiences. By implementing optimization strategies like lazy loading, image optimization, code splitting, and others, developers can ensure their apps remain competitive in the market. Connect with us on LinkedIn to stay updated on the latest optimization techniques. Thank you for joining our discussion on mastering efficiency in React Native.

Don’t forget to check the complete talk and presentation here 🔽

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