diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index 9ef8610..b32e19f 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -134,77 +134,83 @@ namespace DCFApixels.DragonECS
         public EcsWorld(EcsWorldConfig config, short worldID = -1) : this(config == null ? ConfigContainer.Empty : new ConfigContainer().Set(config), worldID) { }
         public EcsWorld(IConfigContainer configs = null, short worldID = -1)
         {
-            if (configs == null) { configs = ConfigContainer.Empty; }
-            bool nullWorld = this is NullWorld;
-            if (nullWorld == false && worldID == NULL_WORLD_ID)
+            lock (_lock)
             {
-                EcsDebug.PrintWarning($"The world identifier cannot be {NULL_WORLD_ID}");
-            }
-            _configs = configs;
-            EcsWorldConfig config = configs.GetWorldConfigOrDefault();
-
-            if (worldID < 0 || (worldID == NULL_WORLD_ID && nullWorld == false))
-            {
-                worldID = (short)_worldIdDispenser.UseFree();
-            }
-            else
-            {
-                if (worldID != _worldIdDispenser.NullID)
+                if (configs == null) { configs = ConfigContainer.Empty; }
+                bool nullWorld = this is NullWorld;
+                if (nullWorld == false && worldID == NULL_WORLD_ID)
                 {
-                    _worldIdDispenser.Use(worldID);
+                    EcsDebug.PrintWarning($"The world identifier cannot be {NULL_WORLD_ID}");
                 }
-                if (_worlds[worldID] != null)
+                _configs = configs;
+                EcsWorldConfig config = configs.GetWorldConfigOrDefault();
+
+                if (worldID < 0 || (worldID == NULL_WORLD_ID && nullWorld == false))
                 {
-                    _worldIdDispenser.Release(worldID);
-                    Throw.Exception("The world with the specified ID has already been created\r\n");
+                    worldID = (short)_worldIdDispenser.UseFree();
                 }
+                else
+                {
+                    if (worldID != _worldIdDispenser.NullID)
+                    {
+                        _worldIdDispenser.Use(worldID);
+                    }
+                    if (_worlds[worldID] != null)
+                    {
+                        _worldIdDispenser.Release(worldID);
+                        Throw.Exception("The world with the specified ID has already been created\r\n");
+                    }
+                }
+                id = worldID;
+                _worlds[worldID] = this;
+
+                _poolsMediator = new PoolsMediator(this);
+                _executorsMediator = new ExecutorMediator(this);
+
+                int poolsCapacity = ArrayUtility.NormalizeSizeToPowerOfTwo(config.PoolsCapacity);
+                _pools = new IEcsPoolImplementation[poolsCapacity];
+                _poolSlots = new PoolSlot[poolsCapacity];
+                ArrayUtility.Fill(_pools, _nullPool);
+
+                int entitiesCapacity = ArrayUtility.NormalizeSizeToPowerOfTwo(config.EntitiesCapacity);
+                _entityDispenser = new IdDispenser(entitiesCapacity, 0, OnEntityDispenserResized);
+
+                GetComponentTypeID<NullComponent>();
             }
-            id = worldID;
-            _worlds[worldID] = this;
-
-            _poolsMediator = new PoolsMediator(this);
-            _executorsMediator = new ExecutorMediator(this);
-
-            int poolsCapacity = ArrayUtility.NormalizeSizeToPowerOfTwo(config.PoolsCapacity);
-            _pools = new IEcsPoolImplementation[poolsCapacity];
-            _poolSlots = new PoolSlot[poolsCapacity];
-            ArrayUtility.Fill(_pools, _nullPool);
-
-            int entitiesCapacity = ArrayUtility.NormalizeSizeToPowerOfTwo(config.EntitiesCapacity);
-            _entityDispenser = new IdDispenser(entitiesCapacity, 0, OnEntityDispenserResized);
-
-            GetComponentTypeID<NullComponent>();
         }
         public void Destroy()
         {
-            if (_isDestroyed)
-            {
-                EcsDebug.PrintWarning("The world is already destroyed");
-                return;
-            }
-            if (id == NULL_WORLD_ID)
+            lock (_lock)
             {
+                if (_isDestroyed)
+                {
+                    EcsDebug.PrintWarning("The world is already destroyed");
+                    return;
+                }
+                if (id == NULL_WORLD_ID)
+                {
 #if (DEBUG && !DISABLE_DEBUG)
-                Throw.World_WorldCantBeDestroyed();
+                    Throw.World_WorldCantBeDestroyed();
 #endif
-                return;
-            }
-            _listeners.InvokeOnWorldDestroy();
-            _entityDispenser = null;
-            _pools = null;
-            _nullPool = null;
-            _worlds[id] = null;
-            ReleaseData(id);
-            _worldIdDispenser.Release(id);
-            _isDestroyed = true;
-            _poolTypeCode_2_CmpTypeIDs = null;
-            _cmpTypeCode_2_CmpTypeIDs = null;
+                    return;
+                }
+                _listeners.InvokeOnWorldDestroy();
+                _entityDispenser = null;
+                _pools = null;
+                _nullPool = null;
+                _worlds[id] = null;
+                ReleaseData(id);
+                _worldIdDispenser.Release(id);
+                _isDestroyed = true;
+                _poolTypeCode_2_CmpTypeIDs = null;
+                _cmpTypeCode_2_CmpTypeIDs = null;
 
-            foreach (var item in _executorCoures)
-            {
-                item.Value.Destroy();
+                foreach (var item in _executorCoures)
+                {
+                    item.Value.Destroy();
+                }
+                //_entities - не обнуляется для работы entlong.IsAlive
             }
-            //_entities - не обнуляется для работы entlong.IsAlive
         }
         //public void Clear() { }
         #endregion
diff --git a/src/EcsWorld.static.cs b/src/EcsWorld.static.cs
index c056edb..5a093da 100644
--- a/src/EcsWorld.static.cs
+++ b/src/EcsWorld.static.cs
@@ -26,29 +26,30 @@ namespace DCFApixels.DragonECS
         private const int DEL_ENT_BUFFER_MIN_SIZE = 64;
 
         private static EcsWorld[] _worlds = Array.Empty<EcsWorld>();
-        private static IdDispenser _worldIdDispenser = new IdDispenser(4, 0, OnWorldIdDispenser);
+        private static IdDispenser _worldIdDispenser = new IdDispenser(4, 0, n => Array.Resize(ref _worlds, n));
 
         private static List<DataReleaser> _dataReleaseres = new List<DataReleaser>();
         //public static int Copacity => Worlds.Length;
 
+        private static readonly object _lock = new object();
+
         static EcsWorld()
         {
             _worlds[NULL_WORLD_ID] = new NullWorld();
         }
         private static void ReleaseData(int worldID)
-        {
-            for (int i = 0, iMax = _dataReleaseres.Count; i < iMax; i++)
+        {// ts
+            lock (_lock)
             {
-                _dataReleaseres[i].Release(worldID);
+                for (int i = 0, iMax = _dataReleaseres.Count; i < iMax; i++)
+                {
+                    _dataReleaseres[i].Release(worldID);
+                }
             }
         }
-        public static void OnWorldIdDispenser(int newSize)
-        {
-            Array.Resize(ref _worlds, newSize);
-        }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static EcsWorld GetWorld(short worldID)
-        {
+        {// ts
             return _worlds[worldID];
         }
 
@@ -63,6 +64,7 @@ namespace DCFApixels.DragonECS
             return ref WorldComponentPool<T>.GetForWorldUnchecked(worldID);
         }
 
+
         private abstract class DataReleaser
         {
             public abstract void Release(int worldID);
@@ -76,64 +78,84 @@ namespace DCFApixels.DragonECS
             private static short _recycledItemsCount;
             private static IEcsWorldComponent<T> _interface = EcsWorldComponentHandler<T>.instance;
 
+            private static readonly object _lock = new object();
+
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             public static ref T Get(int itemIndex)
-            {
+            {// ts
                 return ref _items[itemIndex];
             }
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             public static ref T GetForWorld(int worldID)
-            {
-                int index = GetItemIndex(worldID);
-                return ref _items[index];
+            {// зависит от GetItemIndex
+                return ref Get(GetItemIndex(worldID));
             }
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             public static ref T GetForWorldUnchecked(int worldID)
-            {
-#if (DEBUG && !DISABLE_DEBUG)
+            {// ts
+#if (DEBUG && !DISABLE_DEBUG) || ENABLE_DRAGONECS_ASSERT_CHEKS
                 if (_mapping[worldID] <= 0) { Throw.UndefinedException(); }
 #endif
                 return ref _items[_mapping[worldID]];
             }
             public static int GetItemIndex(int worldID)
-            {
+            {// ts
                 if (_mapping.Length < _worlds.Length)
                 {
-                    Array.Resize(ref _mapping, _worlds.Length);
+                    lock (_lock)
+                    {
+                        if (_mapping.Length < _worlds.Length)
+                        {
+                            Array.Resize(ref _mapping, _worlds.Length);
+                        }
+                    }
                 }
-                ref short itemIndex = ref _mapping[worldID];
-                if (itemIndex <= 0)
+                short itemIndex = _mapping[worldID];
+
+                if (itemIndex == 0)
                 {
-                    if (_recycledItemsCount > 0)
+                    lock (_lock)
                     {
-                        _count++;
-                        itemIndex = _recycledItems[--_recycledItemsCount];
+                        itemIndex = _mapping[worldID];
+                        if (itemIndex <= 0)
+                        {
+                            if (_recycledItemsCount > 0)
+                            {
+                                _count++;
+                                itemIndex = _recycledItems[--_recycledItemsCount];
+                            }
+                            else
+                            {
+                                itemIndex = ++_count;
+                            }
+                            _mapping[worldID] = itemIndex;
+
+                            if (_items.Length <= itemIndex)
+                            {
+                                Array.Resize(ref _items, _items.Length << 1);
+                            }
+                            _interface.Init(ref _items[itemIndex], _worlds[worldID]);
+                            _dataReleaseres.Add(new Releaser());
+                        }
                     }
-                    else
-                    {
-                        itemIndex = ++_count;
-                    }
-                    if (_items.Length <= itemIndex)
-                    {
-                        Array.Resize(ref _items, _items.Length << 1);
-                    }
-                    _interface.Init(ref _items[itemIndex], _worlds[worldID]);
-                    _dataReleaseres.Add(new Releaser());
                 }
                 return itemIndex;
             }
             private static void Release(int worldID)
-            {
-                if (_mapping.Length < _worlds.Length)
+            {// ts
+                lock (_lock)
                 {
-                    Array.Resize(ref _mapping, _worlds.Length);
-                }
-                ref short itemIndex = ref _mapping[worldID];
-                if (itemIndex != 0)
-                {
-                    _interface.OnDestroy(ref _items[itemIndex], _worlds[worldID]);
-                    _recycledItems[_recycledItemsCount++] = itemIndex;
-                    itemIndex = 0;
+                    if (_mapping.Length < _worlds.Length)
+                    {
+                        Array.Resize(ref _mapping, _worlds.Length);
+                    }
+                    ref short itemIndex = ref _mapping[worldID];
+                    if (itemIndex != 0)
+                    {
+                        _interface.OnDestroy(ref _items[itemIndex], _worlds[worldID]);
+                        _recycledItems[_recycledItemsCount++] = itemIndex;
+                        itemIndex = 0;
+                    }
                 }
             }
             private sealed class Releaser : DataReleaser