Index: src/game/Level0.cpp
===================================================================
--- src/game/Level0.cpp	(revision 3252)
+++ src/game/Level0.cpp	(working copy)
@@ -150,6 +150,17 @@
 
     PSendSysMessage(LANG_CONNECTED_USERS, clientsNum, maxClientsNum);
 
+    if(!m_session->GetSecurity())
+        return true;
+
+    // additional info
+    PSendSysMessage("Field memory allocated: bit-based %u mirror based %u percent %f", 
+        sWorld.m_updateSize_BitBased, sWorld.m_updateSize_MirrorBased, 
+        sWorld.m_updateSize_MirrorBased*100.0f/sWorld.m_updateSize_BitBased);
+    PSendSysMessage("Field updates sent: bit-based %u mirror based %u percent %f", 
+        sWorld.m_updateCount_BitBased, sWorld.m_updateCount_MirrorBased, 
+        sWorld.m_updateCount_MirrorBased*100.0f/sWorld.m_updateCount_BitBased);
+
     return true;
 }
 
Index: src/game/Object.cpp
===================================================================
--- src/game/Object.cpp	(revision 3252)
+++ src/game/Object.cpp	(working copy)
@@ -40,6 +40,7 @@
     m_objectType        = TYPE_OBJECT;
 
     m_uint32Values      = 0;
+    m_uint32Values_mirror = 0;
     m_valuesCount       = 0;
 
     m_inWorld           = false;
@@ -56,10 +57,27 @@
     {
         //DEBUG_LOG("Object desctr 1 check (%p)",(void*)this);
         delete [] m_uint32Values;
+        delete [] m_uint32Values_mirror;
         //DEBUG_LOG("Object desctr 2 check (%p)",(void*)this);
     }
 }
 
+void Object::_InitValues()
+{
+    m_uint32Values = new uint32[ m_valuesCount ];
+    memset(m_uint32Values, 0, m_valuesCount*sizeof(uint32));
+
+    m_uint32Values_mirror = new uint32[ m_valuesCount ];
+    memset(m_uint32Values_mirror, 0, m_valuesCount*sizeof(uint32));
+
+    m_updateMask.SetCount(m_valuesCount);
+    ClearUpdateMask();
+
+    sWorld.m_updateSize_BitBased += m_valuesCount*4 + m_updateMask.GetBlockCount()*4;
+    sWorld.m_updateSize_MirrorBased += m_valuesCount*4*2;
+}
+
+
 void Object::_Create( uint32 guidlow, uint32 guidhigh )
 {
     if(!m_uint32Values) _InitValues();
@@ -315,6 +333,8 @@
     {
         if( updateMask->GetBit( index ) )
         {
+            ++sWorld.m_updateCount_BitBased;
+
             // Some values at server stored in float format but must be sended to client in uint32 format
             if( isType(TYPE_UNIT) && (
                 index >= UNIT_FIELD_POWER1         && index <= UNIT_FIELD_MAXPOWER5 ||
@@ -332,6 +352,12 @@
                 *data << m_uint32Values[ index ];
             }
         }
+
+        if(m_uint32Values_mirror[index] != m_uint32Values[index])
+        {
+            ++sWorld.m_updateCount_MirrorBased;
+            m_uint32Values_mirror[index] = m_uint32Values[index];
+        }
     }
 }
 
Index: src/game/Object.h
===================================================================
--- src/game/Object.h	(revision 3252)
+++ src/game/Object.h	(working copy)
@@ -184,15 +184,7 @@
 
         Object ( );
 
-        void _InitValues()
-        {
-            m_uint32Values = new uint32[ m_valuesCount ];
-            memset(m_uint32Values, 0, m_valuesCount*sizeof(uint32));
-
-            m_updateMask.SetCount(m_valuesCount);
-            ClearUpdateMask();
-        }
-
+        void _InitValues();
         void _Create (uint32 guidlow, uint32 guidhigh);
 
         virtual void _SetUpdateBits(UpdateMask *updateMask, Player *target) const;
@@ -212,6 +204,8 @@
             float *m_floatValues;
         };
 
+        uint32 *m_uint32Values_mirror;
+
         uint16 m_valuesCount;
 
         UpdateMask m_updateMask;
Index: src/game/World.cpp
===================================================================
--- src/game/World.cpp	(revision 3252)
+++ src/game/World.cpp	(working copy)
@@ -85,6 +85,11 @@
     m_ShutdownTimer = 0;
     m_gameTime=time(NULL);
     m_maxSessionsCount = 0;
+
+    m_updateSize_BitBased = 0;
+    m_updateSize_MirrorBased = 0;
+    m_updateCount_BitBased = 0;
+    m_updateCount_MirrorBased = 0;
 }
 /// World desctructor
 World::~World()
Index: src/game/World.h
===================================================================
--- src/game/World.h	(revision 3252)
+++ src/game/World.h	(working copy)
@@ -228,6 +228,12 @@
 
         void ScriptsStart(map<uint32, multimap<uint32, ScriptInfo> > const& scripts, uint32 id, Object* source, Object* target);
 
+        //TEMPORARY: field update sending stats stor
+        uint32 m_updateSize_BitBased;
+        uint32 m_updateSize_MirrorBased;
+        uint32 m_updateCount_BitBased;
+        uint32 m_updateCount_MirrorBased;
+
     protected:
 
         void _UpdateGameTime();