Performance tips for ViewModel in Android?

When working with ViewModels in Android, optimizing performance is crucial for creating responsive and efficient applications. Here are some tips to enhance the performance of ViewModels:

• Use LiveData: Utilize LiveData to observe data changes in your UI components. This helps ensure that data is delivered to the view only when it’s in an active state, thus reducing unnecessary UI updates.
• ViewModel Scope: Keep in mind ViewModel’s scope. It survives configuration changes, which allows you to manage UI-related data lifecycle consciously. Always clear references to activities or fragments to prevent memory leaks.
• Reduce Data Retrieval: Optimize data retrieval methods within the ViewModel. For instance, aggregate data fetching into a single network call instead of multiple calls, if possible.
• Use MutableSharedFlow or StateFlow: For more complex data handling beyond LiveData, consider using Kotlin's Flow API, such as MutableSharedFlow or StateFlow, for handling event-driven UI updates.
• Implement Caching Strategies: Implement caching within ViewModels for frequently accessed data. This can drastically reduce the number of calls to the database or network.
• Keep Business Logic in ViewModel: Shift as much logic as possible to the ViewModel instead of the UI to keep the UI lightweight and responsive.