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-# Memory Optimization Recommendations for Allstarr
-
-## Current Implementation Status
-
-✅ **COMPLETED**: Mark-for-deletion system with 24-hour delay
-✅ **COMPLETED**: Persistent favorites tracking using JSON files
-✅ **COMPLETED**: Cache-first copying for favorites (avoids re-downloads)
-✅ **COMPLETED**: Dependency injection for CacheCleanupService to process pending deletions
-
-## Memory Optimization Strategies
-
-### 1. Collection Optimizations
-
-**Current Issues:**
-- Multiple `List<Song>`, `List<Album>`, `List<Artist>` collections created during searches
-- Large `Dictionary<string, object?>` objects for Jellyfin metadata
-- Concurrent collections like `ConcurrentDictionary<string, SessionInfo>` for sessions
-
-**Recommendations:**
-```csharp
-// Use ArrayPool for temporary collections
-private static readonly ArrayPool<Song> SongArrayPool = ArrayPool<Song>.Shared;
-
-// Use Span<T> for temporary operations
-ReadOnlySpan<Song> ProcessSongs(ReadOnlySpan<Song> songs) { ... }
-
-// Use IAsyncEnumerable for streaming large results
-IAsyncEnumerable<Song> SearchSongsStreamAsync(string query);
-```
-
-### 2. JSON Serialization Optimizations
-
-**Current Issues:**
-- Heavy use of `JsonSerializer.Deserialize<Dictionary<string, object?>>()` 
-- Multiple serialization/deserialization cycles for caching
-
-**Recommendations:**
-```csharp
-// Use System.Text.Json source generators for better performance
-[JsonSerializable(typeof(List<Song>))]
-[JsonSerializable(typeof(Dictionary<string, FavoriteTrackInfo>))]
-public partial class AllstarrJsonContext : JsonSerializerContext { }
-
-// Use JsonDocument for read-only scenarios instead of Dictionary
-JsonDocument.Parse(json).RootElement.GetProperty("Items")
-```
-
-### 3. Caching Strategy Improvements
-
-**Current Issues:**
-- File-based caching creates multiple copies of data
-- Redis and file caches can contain duplicate data
-
-**Recommendations:**
-```csharp
-// Implement cache eviction policies
-public class LRUCache<TKey, TValue> where TKey : notnull
-{
-    private readonly int _maxSize;
-    private readonly Dictionary<TKey, LinkedListNode<CacheItem>> _cache;
-    private readonly LinkedList<CacheItem> _lruList;
-}
-
-// Use weak references for large objects
-private readonly WeakReference<List<Song>> _cachedSongs = new(null);
-```
-
-### 4. String Interning and Optimization
-
-**Current Issues:**
-- Many duplicate strings (artist names, album titles) across collections
-- Path strings created repeatedly
-
-**Recommendations:**
-```csharp
-// Use string interning for common values
-private static readonly ConcurrentDictionary<string, string> InternedStrings = new();
-public static string Intern(string value) => InternedStrings.GetOrAdd(value, v => v);
-
-// Use StringBuilder for path construction
-private static readonly ThreadLocal<StringBuilder> PathBuilder = 
-    new(() => new StringBuilder(256));
-```
-
-### 5. Background Service Optimizations
-
-**Current Issues:**
-- Multiple background services running simultaneously
-- Potential memory leaks in long-running services
-
-**Recommendations:**
-```csharp
-// Implement proper disposal patterns
-public class CacheCleanupService : BackgroundService, IDisposable
-{
-    private readonly SemaphoreSlim _semaphore = new(1, 1);
-    
-    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
-    {
-        using var _ = await _semaphore.WaitAsync(stoppingToken);
-        // ... cleanup logic
-    }
-    
-    public override void Dispose()
-    {
-        _semaphore?.Dispose();
-        base.Dispose();
-    }
-}
-```
-
-### 6. HTTP Client Optimizations
-
-**Current Issues:**
-- Multiple HTTP clients for different services
-- Large response buffers
-
-**Recommendations:**
-```csharp
-// Use HttpClientFactory with proper configuration
-builder.Services.AddHttpClient<DeezerMetadataService>(client =>
-{
-    client.DefaultRequestHeaders.Add("User-Agent", "Allstarr/1.0");
-    client.Timeout = TimeSpan.FromSeconds(30);
-})
-.ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler
-{
-    MaxConnectionsPerServer = 10,
-    PooledConnectionLifetime = TimeSpan.FromMinutes(15)
-});
-
-// Stream large responses instead of loading into memory
-using var stream = await response.Content.ReadAsStreamAsync();
-using var reader = new StreamReader(stream);
-```
-
-### 7. Container Memory Limits
-
-**Docker Configuration:**
-```dockerfile
-# Set memory limits in docker-compose.yml
-services:
-  allstarr:
-    deploy:
-      resources:
-        limits:
-          memory: 512M
-        reservations:
-          memory: 256M
-```
-
-**Runtime Configuration:**
-```csharp
-// Configure GC for container environments
-GCSettings.LatencyMode = GCLatencyMode.Batch;
-GC.Collect(2, GCCollectionMode.Optimized);
-```
-
-## Immediate Actions (Priority Order)
-
-1. **Enable GC monitoring** - Add memory usage logging to identify hotspots
-2. **Implement cache size limits** - Prevent unbounded growth of in-memory caches
-3. **Use object pooling** - For frequently allocated objects like Song/Album/Artist
-4. **Stream large responses** - Instead of loading entire JSON responses into memory
-5. **Optimize JSON serialization** - Use source generators and reduce Dictionary usage
-
-## Monitoring Recommendations
-
-```csharp
-// Add memory monitoring to Program.cs
-builder.Services.AddHostedService<MemoryMonitoringService>();
-
-public class MemoryMonitoringService : BackgroundService
-{
-    protected override async Task ExecuteAsync(CancellationToken stoppingToken)
-    {
-        while (!stoppingToken.IsCancellationRequested)
-        {
-            var memoryUsage = GC.GetTotalMemory(false);
-            var gen0 = GC.CollectionCount(0);
-            var gen1 = GC.CollectionCount(1);
-            var gen2 = GC.CollectionCount(2);
-            
-            _logger.LogInformation("Memory: {Memory:N0} bytes, GC: Gen0={Gen0}, Gen1={Gen1}, Gen2={Gen2}",
-                memoryUsage, gen0, gen1, gen2);
-                
-            await Task.Delay(TimeSpan.FromMinutes(5), stoppingToken);
-        }
-    }
-}
-```
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