From eac30d4664916eb4b1d9a51e972a4b2ec7360317 Mon Sep 17 00:00:00 2001
From: Louis McLaughlin <louis.mclaughlin@unity3d.com>
Date: Thu, 24 Jul 2025 11:08:37 +0800
Subject: [PATCH] Replaced HashSet.UnionWith() with loop to avoid heap alloc

---
 .../Runtime/Core/NetworkBehaviourUpdater.cs                  | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviourUpdater.cs b/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviourUpdater.cs
index 524f6a2025..beb540891b 100644
--- a/com.unity.netcode.gameobjects/Runtime/Core/NetworkBehaviourUpdater.cs
+++ b/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 o in m_PendingDirtyNetworkObjects)
+                {
+                    m_DirtyNetworkObjects.Add(o);
+                }
                 m_PendingDirtyNetworkObjects.Clear();
 
                 // NetworkObject references can become null, when hidden or despawned. Once NUll, there is no point