Mobile App Performance Optimization Guide

App Launch Time

• Optimize initialization code
• Implement lazy loading
• Minimize startup tasks
• Use background loading
• Cache initial data

Screen Loading

• Implement progressive loading
• Optimize network calls
• Cache screen data
• Use loading placeholders
• Prefetch data

Asset Loading

• Optimize image sizes
• Use proper image formats
• Implement image caching
• Compress resources
• Asset preloading

Memory Leaks

• Proper resource disposal
• Release unused objects
• Handle view lifecycle
• Monitor memory usage
• Regular leak testing

Cache Management

• Implement cache limits
• Clear unused cache
• Use weak references
• Optimize cache size
• Cache eviction policies

Data Structures

• Use efficient collections
• Minimize object creation
• Implement pooling
• Optimize data models
• Reduce nested objects

Background Processing

• Minimize background tasks
• Optimize wake locks
• Batch background operations
• Use work manager
• Implement doze mode

Network Usage

• Batch network requests
• Implement caching
• Use efficient APIs
• Monitor data usage
• Handle connectivity changes

Location Services

• Optimize location updates
• Use geofencing
• Balance accuracy/battery
• Handle location modes
• Implement location caching

API Optimization

• Minimize payload size
• Implement caching
• Use compression
• Batch requests
• Handle offline mode

Data Transfer

• Implement pagination
• Use efficient formats
• Optimize images
• Cache responses
• Handle timeouts

Connection Handling

• Handle poor connectivity
• Implement retry logic
• Monitor connection speed
• Adapt to conditions
• Background sync

View Recycling

// Implement RecyclerView for efficient list rendering
class MyAdapter extends RecyclerView.Adapter<MyViewHolder> {
    @Override
    public void onBindViewHolder(@NonNull MyViewHolder holder, int position) {
        // Efficient view recycling
        holder.bind(data[position]);
    }
}
      

Image Loading

// Use Glide for efficient image loading
Glide.with(context)
     .load(imageUrl)
     .diskCacheStrategy(DiskCacheStrategy.ALL)
     .into(imageView);
      

Memory Management

// Use ARC and weak references
class ViewController {
    weak var delegate: SomeDelegate?
    
    func loadData() {
        // Proper memory management
        autoreleasepool {
            // Heavy operations
        }
    }
}
      

Collection View Optimization

// Implement cell prefetching
extension ViewController: UICollectionViewDataSourcePrefetching {
    func collectionView(_ collectionView: UICollectionView,
                       prefetchItemsAt indexPaths: [IndexPath]) {
        // Prefetch data for smooth scrolling
    }
}