Merge branch 'develop-2.0.0' into feat/attachable-networkbehaviour-and-object-controller

Author: NoelStephensUnity

com.unity.netcode.gameobjects/CHANGELOG.md

@@ -10,6 +10,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 ### Added
 
+- Added `AsNativeArray()` read‑only accessor to `NetworkList<T>` (#3567)
 
 ### Fixed
 
@@ -34,6 +35,7 @@ Additional documentation and release notes are available at [Multiplayer Documen
 
 ### Fixed
 
+- Removed allocation to the heap in NetworkBehaviourUpdate. (#3573)
 - Fixed issue where NetworkConfig.ConnectionData could cause the ConnectionRequestMessage to exceed the transport's MTU size and would result in a buffer overflow error. (#3564)
 - Fixed regression issue in v2.x where `NetworkObject.GetNetworkBehaviourAtOrderIndex` was converted from public to internal. (#3541)
 - Fixed ensuring OnValueChanged callback is still triggered on the authority when a collection changes and then reverts to the previous value in the same frame. (#3539)

com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviourUpdater.cs

@@ -34,7 +34,10 @@ internal void NetworkBehaviourUpdate(bool forceSend = false)
 #endif
             try
             {
-                m_DirtyNetworkObjects.UnionWith(m_PendingDirtyNetworkObjects);
+                foreach (var dirtyNetworkObject in m_PendingDirtyNetworkObjects)
+                {
+                    m_DirtyNetworkObjects.Add(dirtyNetworkObject);
+                }
                 m_PendingDirtyNetworkObjects.Clear();
 
                 // NetworkObject references can become null, when hidden or despawned. Once NUll, there is no point

com.unity.netcode.gameobjects/Runtime/NetworkVariable/Collections/NetworkList.cs

@@ -631,6 +631,24 @@ public T this[int index]
             }
         }
 
+        /// <summary>
+        /// Gets a **zero‑allocation**, <see cref="NativeArray{T}.ReadOnly"/> view over the current
+        /// elements of this <see cref="NetworkList{T}"/>.
+        /// </summary>
+        /// <remarks>
+        /// The returned array stays valid **only until** the list is mutated (add, remove,
+        /// clear, resize) or <see cref="Dispose()"/> is called on the container.  Continuing to use
+        /// the array after it is invalid will result in undefined behaviour;
+        /// callers are responsible for ensuring a safe lifetime.
+        /// </remarks>
+        /// <returns>
+        /// A <see cref="NativeArray{T}.ReadOnly"/> reference that shares the same backing memory as this list.
+        /// </returns>
+        public NativeArray<T>.ReadOnly AsNativeArray()
+        {
+            return m_List.AsReadOnly();
+        }
+
         private void HandleAddListEvent(NetworkListEvent<T> listEvent)
         {
             m_DirtyEvents.Add(listEvent);