Early out for scene graphs with no update callbacks in SceneManager::notifyAttached

components/resource/scenemanager.cpp

@@ -477,10 +477,14 @@ namespace Resource
     }
 
     void SceneManager::notifyAttached(osg::Node *node) const
+    {
+        // we can skip any scene graphs without update callbacks since we know that particle emitters will have an update callback set
+        if (node->getNumChildrenRequiringUpdateTraversal() > 0)
         {
             InitWorldSpaceParticlesVisitor visitor (mParticleSystemMask);
             node->accept(visitor);
         }
+    }
 
     Resource::ImageManager* SceneManager::getImageManager()
     {