To improve performance, analyze the app's resource usage. Optimize images, reduce memory consumption, and limit the number of active processes. Tools like profilers can help identify bottlenecks.

Performance issues in cross-platform applications often stem from differences in how each platform handles resources and executes code. Start by using profiling tools to identify performance bottlenecks in your application. Focus on areas such as CPU usage, memory consumption, and rendering times. It’s essential to ensure that images and media are appropriately optimized for each platform; high-resolution images can drastically slow down performance. Additionally, evaluate the architecture of your app to ensure efficient data handling and minimize unnecessary computations. Implementing lazy loading for components can enhance perceived performance by loading only what's needed at any given time. Keep in mind that asynchronous programming can also help manage heavy tasks without blocking the main thread. Lastly, regular testing on real devices will provide the best insights, as emulators may not accurately represent performance across platforms.