perf : 文件验证和文件下载并发设置为合理的默认值，并限制参数为合理范围。

Assets/YooAsset/Runtime/FileSystem/DefaultCacheFileSystem/DefaultCacheFileSystem.cs

@@ -73,8 +73,10 @@ namespace YooAsset
 
         /// <summary>
         /// 自定义参数：初始化的时候缓存文件校验最大并发数
+        /// 默认值：32（推荐范围 1-128）
+        /// 说明：过大的值可能导致线程池任务过多，影响系统稳定性 
         /// </summary>
-        public int FileVerifyMaxConcurrency { private set; get; } = int.MaxValue;
+        public int FileVerifyMaxConcurrency { private set; get; } = 32;
 
         /// <summary>
         /// 自定义参数：数据文件追加文件格式
@@ -88,13 +90,17 @@ namespace YooAsset
 
         /// <summary>
         /// 自定义参数：最大并发连接数
+        /// 默认值：10（推荐范围 1-32）
+        /// 说明：过大的并发数可能被服务器限流，也会增加本地资源消耗 
         /// </summary>
-        public int DownloadMaxConcurrency { private set; get; } = int.MaxValue;
+        public int DownloadMaxConcurrency { private set; get; } = 10;
 
         /// <summary>
         /// 自定义参数：每帧发起的最大请求数
+        /// 默认值：5（推荐范围 1-10） 
+        /// 说明：避免单帧发起过多请求导致卡顿 
         /// </summary>
-        public int DownloadMaxRequestPerFrame { private set; get; } = int.MaxValue;
+        public int DownloadMaxRequestPerFrame { private set; get; } = 5;
 
         /// <summary>
         /// 自定义参数：下载任务的看门狗机制监控时间
@@ -242,7 +248,14 @@ namespace YooAsset
             else if (name == FileSystemParametersDefine.FILE_VERIFY_MAX_CONCURRENCY)
             {
                 int convertValue = Convert.ToInt32(value);
-                FileVerifyMaxConcurrency = Mathf.Clamp(convertValue, 1, int.MaxValue);
+                if (convertValue > 256)
+                {
+                    YooLogger.Warning($"FILE_VERIFY_MAX_CONCURRENCY value {convertValue} is too large, clamped to 256. Recommended range: 1 - 128.");
+                }
+
+                // 限制在合理范围内：1-256                                                                             
+                // 超过 256 的并发数对于文件验证来说没有意义，反而会增加线程池压力  
+                FileVerifyMaxConcurrency = Mathf.Clamp(convertValue, 1, 256);
             }
             else if (name == FileSystemParametersDefine.APPEND_FILE_EXTENSION)
             {
@@ -255,12 +268,22 @@ namespace YooAsset
             else if (name == FileSystemParametersDefine.DOWNLOAD_MAX_CONCURRENCY)
             {
                 int convertValue = Convert.ToInt32(value);
-                DownloadMaxConcurrency = Mathf.Clamp(convertValue, 1, int.MaxValue);
+                if (convertValue > 64)
+                {
+                    YooLogger.Warning($"DOWNLOAD_MAX_CONCURRENCY value {convertValue} is too large, clamped to 64. Recommended range: 1 - 32.");
+                }
+
+                DownloadMaxConcurrency = Mathf.Clamp(convertValue, 1, 64);
             }
             else if (name == FileSystemParametersDefine.DOWNLOAD_MAX_REQUEST_PER_FRAME)
             {
                 int convertValue = Convert.ToInt32(value);
-                DownloadMaxRequestPerFrame = Mathf.Clamp(convertValue, 1, int.MaxValue);
+                if (convertValue > 20)
+                {
+                    YooLogger.Warning($"DOWNLOAD_MAX_REQUEST_PER_FRAME value {convertValue} is too large, clamped to 20. Recommended range: 1 - 10.");
+                }
+
+                DownloadMaxRequestPerFrame = Mathf.Clamp(convertValue, 1, 20);
             }
             else if (name == FileSystemParametersDefine.DOWNLOAD_WATCH_DOG_TIME)
             {

Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs

@@ -188,11 +188,19 @@ namespace YooAsset
                 // 结束记录
                 DebugEndRecording();
 
-                //注意：如果完成回调内发生异常，会导致Task无限期等待
+                try
-                _callback?.Invoke(this);
+                {
-
+                    _callback?.Invoke(this);
-                if (_taskCompletionSource != null)
+                }
-                    _taskCompletionSource.TrySetResult(null);
+                catch (Exception ex)
+                {
+                    YooLogger.Error($"Exception in completion callback: {ex}");
+                }
+                finally
+                {
+                    if (_taskCompletionSource != null)
+                        _taskCompletionSource.TrySetResult(null);
+                }
             }
         }
 

Assets/YooAsset/Runtime/ResourceManager/Provider/ProviderOperation.cs

@@ -269,6 +269,7 @@ namespace YooAsset
 
             if (_resManager.UseWeakReferenceHandle)
             {
+                // TODO 高危风险：如果移除弱引用失败，会导致资源永远无法释放。
                 if (RemoveWeakReference(handle) == false)
                     throw new System.Exception("Should never get here !");
             }
@@ -335,11 +336,18 @@ namespace YooAsset
                 List<WeakReference<HandleBase>> tempers = _weakReferences.ToList();
                 foreach (var weakRef in tempers)
                 {
-                    if (weakRef.TryGetTarget(out HandleBase target))
+                    if (weakRef.TryGetTarget(out HandleBase handle))
                     {
-                        if (target.IsValid)
+                        if (handle.IsValid)
                         {
-                            target.InvokeCallback();
+                            try
+                            {
+                                handle.InvokeCallback();
+                            }
+                            catch (Exception ex)
+                            {
+                                YooLogger.Error($"Exception in completion callback: {ex}");
+                            }
                         }
                     }
                 }
@@ -351,7 +359,14 @@ namespace YooAsset
                 {
                     if (handle.IsValid)
                     {
-                        handle.InvokeCallback();
+                        try
+                        {
+                            handle.InvokeCallback();
+                        }
+                        catch (Exception ex)
+                        {
+                            YooLogger.Error($"Exception in completion callback: {ex}");
+                        }
                     }
                 }
             }