eng-unity-mobile-optimization

Unity Mobile Optimization

Overview

Mobile platforms have unique constraints: limited memory, battery life, thermal throttling, and variable hardware. This skill covers mobile-specific optimization techniques.

When to Use

• iOS and Android development
• Battery-sensitive applications
• Memory-constrained devices
• Thermal management
• Variable quality settings

Memory Management

Memory Budget System

public class MobileMemoryManager : MonoBehaviour
{
    [SerializeField] private long _warningThresholdMB = 800;
    [SerializeField] private long _criticalThresholdMB = 1000;
    
    public event Action OnMemoryWarning;
    public event Action OnMemoryCritical;
    
    private void Awake()
    {
        // iOS memory warning callback
        Application.lowMemory += OnLowMemory;
    }
    
    private void OnDestroy()
    {
        Application.lowMemory -= OnLowMemory;
    }
    
    private void OnLowMemory()
    {
        Debug.LogWarning("Low memory warning received");
        OnMemoryCritical?.Invoke();
        
        // Emergency cleanup
        Resources.UnloadUnusedAssets();
        GC.Collect();
    }
    
    public MemoryStatus GetMemoryStatus()
    {
        long usedMB = Profiler.GetTotalAllocatedMemoryLong() / 1_000_000;
        
        if (usedMB >= _criticalThresholdMB)
            return MemoryStatus.Critical;
        if (usedMB >= _warningThresholdMB)
            return MemoryStatus.Warning;
        return MemoryStatus.Normal;
    }
    
    public void RequestCleanup()
    {
        // Aggressive cleanup
        StartCoroutine(CleanupRoutine());
    }
    
    private IEnumerator CleanupRoutine()
    {
        // Unload unused assets
        var operation = Resources.UnloadUnusedAssets();
        yield return operation;
        
        // GC with minimal pause
        GC.Collect(0, GCCollectionMode.Optimized);
        yield return null;
        
        GC.Collect(1, GCCollectionMode.Optimized);
    }
}

public enum MemoryStatus { Normal, Warning, Critical }