You've been tasked to ensure the React Native app performs smoothly and feels native. Which of the following strategies would be effective in improving the app's performance?

To improve the performance and responsiveness of a React Native app, implementing code splitting is an effective strategy. This allows you to load only the necessary components when they are needed, reducing the initial load time and improving user experience. Using a single-threaded architecture can lead to performance bottlenecks. Increasing the app bundle size can result in longer load times and negatively impact performance. Using a different JavaScript framework would require rewriting the app and is not a strategy for improving the performance of an existing React Native app.