* Performance Changes:

* Moves Entity Updates into a seperate thread, allowing for OpenSim to utilize a computers CPU more effectively in return for potentially greater user and prim capacity.
* Removes an expensive Sqrt call performed during Update on each object. This should lower CPU requirements for high-prim regions with physics enabled.
* MXP Changes: Centers the region around 0,0 for primitives instead of 128,128. Prim display should now look more correct for MXP viewers.

2 files changed, 17 insertions, 3 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 2a3f068..8d81812 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -64,6 +64,8 @@ namespace OpenSim.Region.Framework.Scenes
 
         protected Timer m_restartWaitTimer = new Timer();
 
+        protected Thread m_updateEntitiesThread;
+
         public SimStatsReporter StatsReporter;
 
         protected List<RegionInfo> m_regionRestartNotifyList = new List<RegionInfo>();
@@ -852,7 +854,19 @@ namespace OpenSim.Region.Framework.Scenes
                     otherMS = Environment.TickCount;
                     // run through all entities looking for updates (slow)
                     if (m_frame % m_update_entities == 0)
-                        m_sceneGraph.UpdateEntities();
+                    {
+                        if (m_updateEntitiesThread == null)
+                        {
+                            m_updateEntitiesThread = new Thread(m_sceneGraph.UpdateEntities);
+                            ThreadTracker.Add(m_updateEntitiesThread);
+                        }
+
+                        if(!m_updateEntitiesThread.IsAlive)
+                            m_updateEntitiesThread.Start();
+
+                        //m_sceneGraph.UpdateEntities();
+                    }
+                        
 
                     // run through entities that have scheduled themselves for
                     // updates looking for updates(faster)
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index d1aef1c..2ca0342 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -1733,12 +1733,12 @@ namespace OpenSim.Region.Framework.Scenes
                     //return;
                 //}
 
-                if ((Util.GetDistanceTo(lastPhysGroupPos, AbsolutePosition) > 0.02) && UsePhysics)
+                if (Util.DistanceLessThan(lastPhysGroupPos, AbsolutePosition, 0.02) && UsePhysics)
                 {
                     m_rootPart.UpdateFlag = 1;
                     lastPhysGroupPos = AbsolutePosition;
                 }
-                    //foreach (SceneObjectPart part in m_parts.Values)
+                //foreach (SceneObjectPart part in m_parts.Values)
                     //{
                         //if (part.UpdateFlag == 0) part.UpdateFlag = 1;
                     //}