perf: avoid boxing if there is no profiler

Author: paulpach

Assets/Mirror/Runtime/NetworkDiagnostics.cs

@@ -54,7 +54,7 @@ internal MessageInfo(IMessageBase message, int channel, int bytes, int count)
         [Conditional("ENABLE_PROFILER")]
         internal static void OnSend<T>(T message, int channel, int bytes, int count) where T : IMessageBase
         {
-            if (count > 0)
+            if (count > 0 && OutMessageEvent != null)
             {
                 MessageInfo outMessage = new MessageInfo(message, channel, bytes, count);
                 OutMessageEvent?.Invoke(outMessage);
@@ -74,8 +74,11 @@ internal static void OnSend<T>(T message, int channel, int bytes, int count) whe
         [Conditional("ENABLE_PROFILER")]
         internal static void OnReceive<T>(T message, int channel, int bytes) where T : IMessageBase
         {
-            MessageInfo inMessage = new MessageInfo(message, channel, bytes, 1);
-            InMessageEvent?.Invoke(inMessage);
+            if (InMessageEvent != null)
+            {
+                MessageInfo inMessage = new MessageInfo(message, channel, bytes, 1);
+                InMessageEvent?.Invoke(inMessage);
+            }
         }
 
         #endregion