move to new System.Threading.Lock type for better performance

MediaBrowser.Controller/Entities/AggregateFolder.cs

@@ -23,7 +23,7 @@ namespace MediaBrowser.Controller.Entities
     /// </summary>
     public class AggregateFolder : Folder
     {
-        private readonly object _childIdsLock = new object();
+        private readonly Lock _childIdsLock = new();
 
         /// <summary>
         /// The _virtual children.

MediaBrowser.Controller/Entities/UserRootFolder.cs

@@ -21,7 +21,7 @@ namespace MediaBrowser.Controller.Entities
     /// </summary>
     public class UserRootFolder : Folder
     {
-        private readonly object _childIdsLock = new object();
+        private readonly Lock _childIdsLock = new();
         private List<Guid> _childrenIds = null;
 
         /// <summary>

MediaBrowser.Controller/MediaEncoding/TranscodingJob.cs

@@ -12,8 +12,8 @@ namespace MediaBrowser.Controller.MediaEncoding;
 public sealed class TranscodingJob : IDisposable
 {
     private readonly ILogger<TranscodingJob> _logger;
-    private readonly object _processLock = new();
-    private readonly object _timerLock = new();
+    private readonly Lock _processLock = new();
+    private readonly Lock _timerLock = new();
 
     private Timer? _killTimer;
 

MediaBrowser.Controller/Net/BasePeriodicWebSocketListener.cs

@@ -33,7 +33,7 @@ namespace MediaBrowser.Controller.Net
             SingleWriter = false
         });
 
-        private readonly object _activeConnectionsLock = new();
+        private readonly Lock _activeConnectionsLock = new();
 
         /// <summary>
         /// The _active connections.

MediaBrowser.Controller/Session/SessionInfo.cs

@@ -25,7 +25,7 @@ namespace MediaBrowser.Controller.Session
         private readonly ISessionManager _sessionManager;
         private readonly ILogger _logger;
 
-        private readonly object _progressLock = new();
+        private readonly Lock _progressLock = new();
         private Timer _progressTimer;
         private PlaybackProgressInfo _lastProgressInfo;