diff --git a/README-RU.md b/README-RU.md
index 63fe803..45df20a 100644
--- a/README-RU.md
+++ b/README-RU.md
@@ -881,13 +881,13 @@ using (_marker.Auto())
 </br>
 
 # Define Symbols
-+ `DISABLE_POOLS_EVENTS` - выключает реактивное поведение в пулах.
-+ `ENABLE_DRAGONECS_DEBUGGER` - включает работу EcsDebug в релизном билде.
-+ `ENABLE_DRAGONECS_ASSERT_CHECKS` - включает опускаемые в релизном билде проверки.
++ `DRAGONECS_DISABLE_POOLS_EVENTS` - выключает реактивное поведение в пулах.
++ `DRAGONECS_ENABLE_DEBUG_SERVICE` - включает работу EcsDebug в релизном билде.
++ `DRAGONECS_STABILITY_MODE` - включает опускаемые в релизном билде проверки.
++ `DRAGONECS_DISABLE_CATH_EXCEPTIONS` - Выключает поведение по умолчанию по обработке исключений. По умолчанию фреймворк будет ловить исключения с выводом информации из исключений через EcsDebug и продолжать работу.
 + `REFLECTION_DISABLED` - Полностью ограничивает работу фреймворка с Reflection.
 + `DISABLE_DEBUG` - Для среды где не поддерживается ручное отключение DEBUG, например Unity.
 + `ENABLE_DUMMY_SPAN` - На случай если в среде не поддерживаются Span типы, включает его замену.
-+ `DISABLE_CATH_EXCEPTIONS` - Выключает поведение по умолчанию по обработке исключений. По умолчанию фреймворк будет ловить исключения с выводом информации из исключений через EcsDebug и продолжать работу.
 
 </br>
 
diff --git a/README-ZH.md b/README-ZH.md
index 8b1e58c..7266641 100644
--- a/README-ZH.md
+++ b/README-ZH.md
@@ -844,13 +844,13 @@ using (_marker.Auto())
 </br>
 
 # Define Symbols
-+ `DISABLE_POOLS_EVENTS` - 禁用池子事件的响应行为。
-+ `ENABLE_DRAGONECS_DEBUGGER` - 在发布版中启用 EcsDebug 的工作。
-+ `ENABLE_DRAGONECS_ASSERT_CHECKS` - 在发布版中启用可忽略的检查和异常。
++ `DRAGONECS_DISABLE_POOLS_EVENTS` - 禁用池子事件的响应行为。
++ `DRAGONECS_ENABLE_DEBUG_SERVICE` - 在发布版中启用 EcsDebug 的工作。
++ `DRAGONECS_STABILITY_MODE` - 默认情况下，为了优化，框架在发布版本中跳过许多异常检查。此定义不是跳过检查，而是将其替换为能够解决错误的代码。这提高了稳定性，但降低了执行速度。
++ `DRAGONECS_DISABLE_CATH_EXCEPTIONS` - 禁用默认的异常处理行为。默认情况下，框架将捕获异常并通过 EcsDebug 输出异常信息，然后继续执行。
 + `REFLECTION_DISABLED` - 完全限制框架内部代码中的 Reflection 使用。
 + `DISABLE_DEBUG` - 用于不支持手动禁用 DEBUG 的环境，例如 Unity。
 + `ENABLE_DUMMY_SPAN` - 如果环境不支持 Span 类型，则启用它的替代。
-+ `DISABLE_CATH_EXCEPTIONS` - 禁用默认的异常处理行为。默认情况下，框架将捕获异常并通过 EcsDebug 输出异常信息，然后继续执行。
 
 </br>
 
diff --git a/README.md b/README.md
index 9bdb823..8edb090 100644
--- a/README.md
+++ b/README.md
@@ -851,13 +851,14 @@ using (_marker.Auto())
 </br>
 
 # Define Symbols
-+ `DISABLE_POOLS_EVENTS` - disables reactive behavior in pools.
-+ `ENABLE_DRAGONECS_DEBUGGER` - enables EcsDebug functionality in release builds.
-+ `ENABLE_DRAGONECS_ASSERT_CHECKS` - enables omitted checks in the release build.
++ `DRAGONECS_DISABLE_POOLS_EVENTS` - Disables reactive behavior in pools.
++ `DRAGONECS_ENABLE_DEBUG_SERVICE` - Enables EcsDebug functionality in release builds.
++ `DRAGONECS_STABILITY_MODE` - By default, for optimization purposes, the framework skips many exception checks in the release build. This define, instead of disabling checks, replaces them with code that resolves errors. This increases stability but reduces execution speed.
++ `DRAGONECS_DISABLE_CATH_EXCEPTIONS` - Turns off the default exception handling behavior. By default, the framework will catch exceptions with the exception information output via EcsDebug and continue working.
 + `REFLECTION_DISABLED` - completely restricts the framework's use of Reflection.
 + `DISABLE_DEBUG` - for environments where manual DEBUG disabling is not supported, e.g., Unity.
 + `ENABLE_DUMMY_SPAN` - For environments where Span types are not supported, enables its replacement.
-+ `DISABLE_CATH_EXCEPTIONS` - Turns off the default exception handling behavior. By default, the framework will catch exceptions with the exception information output via EcsDebug and continue working.
+
 
 </br>
 
diff --git a/package.json b/package.json
index ca0a8f2..ace3df9 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,7 @@
     "displayName": "DragonECS",
     "description": "C# Entity Component System Framework",
     "unity": "2020.3",
-    "version": "0.9.1",
+    "version": "0.9.4",
     "repository": {
         "type": "git",
         "url": "https://github.com/DCFApixels/DragonECS.git"
diff --git a/src/Builtin/BaseProcesses.cs b/src/Builtin/BaseProcesses.cs
index f83fb09..e1cfd1c 100644
--- a/src/Builtin/BaseProcesses.cs
+++ b/src/Builtin/BaseProcesses.cs
@@ -149,7 +149,7 @@ namespace DCFApixels.DragonECS.Internal
                 }
                 catch (Exception e)
                 {
-#if DISABLE_CATH_EXCEPTIONS
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
                     throw;
 #endif
                     EcsDebug.PrintError(e);
@@ -166,10 +166,11 @@ namespace DCFApixels.DragonECS.Internal
                 try { item.Run(); }
                 catch (Exception e)
                 {
-#if DISABLE_CATH_EXCEPTIONS
-                    throw;
-#endif
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
+                    throw e;
+#else
                     EcsDebug.PrintError(e);
+#endif
                 }
             }
 #endif
diff --git a/src/Collections/EcsGroup.cs b/src/Collections/EcsGroup.cs
index aaa2829..7334897 100644
--- a/src/Collections/EcsGroup.cs
+++ b/src/Collections/EcsGroup.cs
@@ -234,8 +234,16 @@ namespace DCFApixels.DragonECS
         }
         internal void ReleaseGroup(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (group.World != this) { Throw.World_GroupDoesNotBelongWorld(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (group.World != this)
+            {
+                if (TryGetWorld(group.WorldID, out EcsWorld sourceWorld))
+                {
+                    group.World.ReleaseGroup(group);
+                }
+            }
 #endif
             group._isReleased = true;
             group.Clear();
@@ -307,8 +315,10 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 if (index < 0 || index >= Count) { Throw.ArgumentOutOfRange(); }
+#elif DRAGONECS_STABILITY_MODE
+                if (index < 0 || index >= Count) { return EcsConsts.NULL_ENTITY_ID; }
 #endif
                 return _dense[++index];
             }
@@ -316,7 +326,7 @@ namespace DCFApixels.DragonECS
             //            set
             //            {
             //                // TODO добавить лок енумератора на изменение
-            //#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+            //#if DEBUG || DRAGONECS_STABILITY_MODE
             //                if (index < 0 || index >= Count) { Throw.ArgumentOutOfRange(); }
             //#endif
             //                var oldValue = _dense[index];
@@ -369,8 +379,10 @@ namespace DCFApixels.DragonECS
         #region Add/Remove
         public void AddUnchecked(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID)) { Throw.Group_AlreadyContains(entityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (Has(entityID)) { return; }
 #endif
             Add_Internal(entityID);
         }
@@ -413,8 +425,10 @@ namespace DCFApixels.DragonECS
 
         public void RemoveUnchecked(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID) == false) { Throw.Group_DoesNotContain(entityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (Has(entityID) == false) { return; }
 #endif
             Remove_Internal(entityID);
         }
@@ -526,13 +540,16 @@ namespace DCFApixels.DragonECS
         #region CopyFrom/Clone/Slice/ToSpan/ToArray
         public void CopyFrom(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (group.World != _source) { Throw.Group_ArgumentDifferentWorldsException(); }
-#endif
-            if (_count > 0)
+#elif DRAGONECS_STABILITY_MODE
+            if (group.World != _source)
             {
                 Clear();
+                return;
             }
+#endif
+            Clear();
             foreach (var entityID in group)
             {
                 Add_Internal(entityID);
@@ -578,8 +595,11 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public EcsSpan Slice(int start, int length)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (start < 0 || start + length > _count) { Throw.ArgumentOutOfRange(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (start < 0) { start = 0; }
+            if (start + length > _count) { length = _count - start; }
 #endif
             return new EcsSpan(WorldID, _dense, start + 1, length);
         }
@@ -622,8 +642,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Union sets</summary>
         public void UnionWith(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group._source) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return; }
 #endif
             foreach (var entityID in group) { UnionWithStep(entityID); }
         }
@@ -633,8 +655,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Union sets</summary>
         public void UnionWith(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return; }
 #endif
             foreach (var entityID in span) { UnionWithStep(entityID); }
         }
@@ -656,8 +680,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Except sets</summary>
         public void ExceptWith(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return; }
 #endif
             if (group.Count > Count) //мини оптимизация, итеррируемся по короткому списку
             {
@@ -681,8 +707,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Except sets</summary>
         public void ExceptWith(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return; }
 #endif
             foreach (var entityID in span) { ExceptWithStep_Internal(entityID); }
         }
@@ -704,8 +732,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Intersect sets</summary>
         public void IntersectWith(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return; }
 #endif
             for (int i = _count; i > 0; i--)//итерация в обратном порядке исключает ошибки при удалении элементов
             {
@@ -722,8 +752,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Intersect sets</summary>
         public void IntersectWith(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return; }
 #endif
             foreach (var entityID in span)
             {
@@ -765,8 +797,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Symmetric Except sets</summary>
         public void SymmetricExceptWith(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return; }
 #endif
             foreach (var entityID in group) { SymmetricExceptWithStep_Internal(entityID); }
         }
@@ -777,8 +811,10 @@ namespace DCFApixels.DragonECS
         /// <summary>as Symmetric Except sets</summary>
         public void SymmetricExceptWith(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return; }
 #endif
             foreach (var entityID in span) { SymmetricExceptWithStep_Internal(entityID); }
         }
@@ -827,8 +863,10 @@ namespace DCFApixels.DragonECS
         #region SetEquals
         public bool SetEquals(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group.World) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return false; }
 #endif
             if (group.Count != Count) { return false; }
             foreach (var entityID in group)
@@ -844,8 +882,10 @@ namespace DCFApixels.DragonECS
         public bool SetEquals(EcsReadonlyGroup group) { return SetEquals(group.GetSource_Internal()); }
         public bool SetEquals(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return false; }
 #endif
             if (span.Count != Count) { return false; }
             foreach (var entityID in span)
@@ -874,8 +914,10 @@ namespace DCFApixels.DragonECS
         #region Overlaps
         public bool Overlaps(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group.World) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return false; }
 #endif
             if (group.Count > Count)
             {
@@ -903,8 +945,10 @@ namespace DCFApixels.DragonECS
         public bool Overlaps(EcsReadonlyGroup group) { return Overlaps(group.GetSource_Internal()); }
         public bool Overlaps(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return false; }
 #endif
             foreach (var entityID in span)
             {
@@ -931,8 +975,10 @@ namespace DCFApixels.DragonECS
         #region IsSubsetOf/IsProperSubsetOf
         public bool IsSubsetOf(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group._source) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return false; }
 #endif
             if (Count == 0) { return true; }
             if (group.Count < Count) { return false; }
@@ -942,8 +988,10 @@ namespace DCFApixels.DragonECS
         public bool IsSubsetOf(EcsReadonlyGroup group) { return IsSubsetOf(group.GetSource_Internal()); }
         public bool IsSubsetOf(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return false; }
 #endif
             if (Count == 0) { return true; }
             if (span.Count < Count) { return false; }
@@ -960,8 +1008,10 @@ namespace DCFApixels.DragonECS
 
         public bool IsProperSubsetOf(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group._source) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return false; }
 #endif
             if (Count == 0) { return true; }
             if (group.Count <= Count) { return false; }
@@ -971,8 +1021,10 @@ namespace DCFApixels.DragonECS
         public bool IsProperSubsetOf(EcsReadonlyGroup group) { return IsProperSubsetOf(group.GetSource_Internal()); }
         public bool IsProperSubsetOf(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return false; }
 #endif
             if (Count == 0) { return true; }
             if (span.Count <= Count) { return false; }
@@ -1035,8 +1087,10 @@ namespace DCFApixels.DragonECS
         #region IsSupersetOf/IsProperSupersetOf
         public bool IsSupersetOf(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group._source) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return false; }
 #endif
             if (group.Count > Count) { return false; }
             return IsSupersetOf_Internal(group);
@@ -1045,8 +1099,10 @@ namespace DCFApixels.DragonECS
         public bool IsSupersetOf(EcsReadonlyGroup group) { return IsSupersetOf(group.GetSource_Internal()); }
         public bool IsSupersetOf(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return false; }
 #endif
             if (span.Count > Count) { return false; }
             return IsSupersetOf_Internal(span);
@@ -1061,8 +1117,10 @@ namespace DCFApixels.DragonECS
 
         public bool IsProperSupersetOf(EcsGroup group)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source != group._source) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (_source != group._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_source != group._source) { return false; }
 #endif
             if (group.Count >= Count) { return false; }
             return IsSupersetOf_Internal(group);
@@ -1071,8 +1129,10 @@ namespace DCFApixels.DragonECS
         public bool IsProperSupersetOf(EcsReadonlyGroup group) { return IsProperSupersetOf(group.GetSource_Internal()); }
         public bool IsProperSupersetOf(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_source.ID != span.WorldID) Throw.Group_ArgumentDifferentWorldsException();
+#if DEBUG
+            if (WorldID != span.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (WorldID != span.WorldID) { return false; }
 #endif
             if (span.Count >= Count) { return false; }
             return IsSupersetOf_Internal(span);
@@ -1129,8 +1189,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Union(EcsGroup a, EcsGroup b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a._source != b._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a._source != b._source) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a._source.GetFreeGroup();
             foreach (var entityID in a)
@@ -1153,8 +1215,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Union(EcsSpan a, EcsSpan b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a.WorldID != b.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a.WorldID != b.WorldID) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a.World.GetFreeGroup();
             foreach (var entityID in a)
@@ -1174,8 +1238,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Except(EcsGroup a, EcsGroup b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a._source != b._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a._source != b._source) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a._source.GetFreeGroup();
             foreach (var entityID in a)
@@ -1191,8 +1257,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Except(EcsSpan a, EcsGroup b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (a.WorldID != b._source.ID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (a.WorldID != b.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a.WorldID != b.WorldID) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = b._source.GetFreeGroup();
             foreach (var entityID in a)
@@ -1208,8 +1276,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Except(EcsSpan a, EcsSpan b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a.WorldID != b.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a.WorldID != b.WorldID) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a.World.GetFreeGroup();
             result.CopyFrom(a);
@@ -1229,8 +1299,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Intersect(EcsGroup a, EcsGroup b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a._source != b._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a._source != b._source) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a._source.GetFreeGroup();
             foreach (var entityID in a)
@@ -1246,8 +1318,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Intersect(EcsSpan a, EcsGroup b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (a.WorldID != b._source.ID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#if DEBUG
+            if (a.WorldID != b.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a.WorldID != b.WorldID) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = b._source.GetFreeGroup();
             foreach (var entityID in a)
@@ -1270,8 +1344,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup Intersect(EcsSpan a, EcsSpan b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a.WorldID != b.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a.WorldID != b.WorldID) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = b.World.GetFreeGroup();
             result.CopyFrom(a);
@@ -1291,8 +1367,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup SymmetricExcept(EcsGroup a, EcsGroup b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a._source != b._source) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a._source != b._source) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a._source.GetFreeGroup();
             foreach (var entityID in a)
@@ -1315,8 +1393,10 @@ namespace DCFApixels.DragonECS
         /// <returns>new group from pool</returns>
         public static EcsGroup SymmetricExcept(EcsSpan a, EcsSpan b)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (a.WorldID != b.WorldID) { Throw.Group_ArgumentDifferentWorldsException(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (a.WorldID != b.WorldID) { return a.World.GetFreeGroup(); }
 #endif
             EcsGroup result = a.World.GetFreeGroup();
             result.CopyFrom(a);
diff --git a/src/Consts.cs b/src/Consts.cs
index 1cf09da..4377352 100644
--- a/src/Consts.cs
+++ b/src/Consts.cs
@@ -1,4 +1,6 @@
-namespace DCFApixels.DragonECS
+using System;
+
+namespace DCFApixels.DragonECS
 {
     public static class EcsConsts
     {
@@ -23,6 +25,8 @@
 
         public const int MAGIC_PRIME = 314159;
 
+        public const int NULL_ENTITY_ID = 0;
+        public const short NULL_WORLD_ID = 0;
         /// meta subgroups
 
         public const string PACK_GROUP = "_" + FRAMEWORK_NAME + "/_Core";
@@ -41,30 +45,34 @@
         public const string MODULES_GROUP = "Modules";
     }
 
-    //TODO заменить ENABLE_DRAGONECS_ASSERT_CHEKS на DEV_MODE и добавить еще PERF_MODE и STAB_MODE
     public static class EcsDefines
     {
-        public const bool DISABLE_POOLS_EVENTS =
-#if DISABLE_POOLS_EVENTS
-            true;
-#else
-    false;
-#endif
-        public const bool ENABLE_DRAGONECS_DEBUGGER =
-#if ENABLE_DRAGONECS_DEBUGGER
+        public const bool DRAGONECS_ENABLE_DEBUG_SERVICE =
+#if DRAGONECS_ENABLE_DEBUG_SERVICE
             true;
 #else
             false;
 #endif
-        public const bool ENABLE_DRAGONECS_ASSERT_CHEKS =
-#if ENABLE_DRAGONECS_ASSERT_CHEKS
+        public const bool DRAGONECS_DISABLE_POOLS_EVENTS =
+#if DRAGONECS_DISABLE_POOLS_EVENTS
             true;
 #else
             false;
 #endif
-
-        public const bool REFLECTION_DISABLED =
-#if REFLECTION_DISABLED
+        public const bool DRAGONECS_DISABLE_CATH_EXCEPTIONS =
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
+            true;
+#else
+            false;
+#endif
+        public const bool DRAGONECS_STABILITY_MODE =
+#if DRAGONECS_STABILITY_MODE
+            true;
+#else
+            false;
+#endif
+        public const bool DRAGONECS_DEEP_DEBUG =
+#if DRAGONECS_DEEP_DEBUG
             true;
 #else
             false;
@@ -75,35 +83,46 @@
 #else
             false;
 #endif
-
-        public const bool ENABLE_DUMMY_SPAN =
-#if ENABLE_DUMMY_SPAN
+        public const bool REFLECTION_DISABLED =
+#if REFLECTION_DISABLED
             true;
 #else
             false;
 #endif
+
+
+
+        [Obsolete("DRAGONECS_ENABLE_DEBUG_SERVICE")]
+        public const bool ENABLE_DRAGONECS_DEBUGGER =
+#if ENABLE_DRAGONECS_DEBUGGER
+            true;
+#else
+            false;
+#endif
+        [Obsolete("DRAGONECS_DISABLE_POOLS_EVENTS")]
+        public const bool DISABLE_POOLS_EVENTS =
+#if DISABLE_POOLS_EVENTS
+            true;
+#else
+            false;
+#endif
+        [Obsolete("DRAGONECS_DISABLE_CATH_EXCEPTIONS")]
         public const bool DISABLE_CATH_EXCEPTIONS =
 #if DISABLE_CATH_EXCEPTIONS
             true;
 #else
             false;
 #endif
-
-
-        public const bool DRAGONECS_PERF_MODE =
-#if DRAGONECS_PERF_MODE
-    true;
+        [Obsolete("DRAGONECS_STABILITY_MODE")]
+        public const bool ENABLE_DRAGONECS_ASSERT_CHEKS =
+#if ENABLE_DRAGONECS_ASSERT_CHEKS
+            true;
 #else
             false;
 #endif
-        public const bool DRAGONECS_STAB_MODE =
-#if DRAGONECS_STAB_MODE
-    true;
-#else
-            false;
-#endif
-        public const bool DRAGONECS_DEEP_DEBUG =
-#if DRAGONECS_DEEP_DEBUG
+        [Obsolete]
+        public const bool ENABLE_DUMMY_SPAN =
+#if ENABLE_DUMMY_SPAN
             true;
 #else
             false;
diff --git a/src/DebugUtils/EcsDebug.cs b/src/DebugUtils/EcsDebug.cs
index 2fa721f..3eac63d 100644
--- a/src/DebugUtils/EcsDebug.cs
+++ b/src/DebugUtils/EcsDebug.cs
@@ -13,39 +13,39 @@ namespace DCFApixels.DragonECS
     using static EcsConsts;
     public readonly struct EcsProfilerMarker
     {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
         public readonly int id;
 #endif
         internal EcsProfilerMarker(int id)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             this.id = id;
 #endif
         }
         public EcsProfilerMarker(string name)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             id = DebugService.CurrentThreadInstance.RegisterMark(name);
 #endif
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Begin()
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             DebugService.CurrentThreadInstance.ProfilerMarkBegin(id);
 #endif
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void End()
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             DebugService.CurrentThreadInstance.ProfilerMarkEnd(id);
 #endif
         }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public AutoScope Auto()
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             return new AutoScope(id);
 #else
             return default;
@@ -53,13 +53,13 @@ namespace DCFApixels.DragonECS
         }
         public readonly ref struct AutoScope
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             private readonly int _id;
 #endif
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             public AutoScope(int id)
             {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
                 _id = id;
                 DebugService.CurrentThreadInstance.ProfilerMarkBegin(id);
 #endif
@@ -67,7 +67,7 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             public void Dispose()
             {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
                 DebugService.CurrentThreadInstance.ProfilerMarkEnd(_id);
 #endif
             }
@@ -94,7 +94,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void PrintWarning(object v)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(DEBUG_WARNING_TAG, v);
             DebugService.CurrentThreadInstance.PrintWarning(v);
 #endif
@@ -102,7 +102,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void PrintError(object v)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(DEBUG_ERROR_TAG, v);
             DebugService.CurrentThreadInstance.PrintError(v);
 #endif
@@ -110,7 +110,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void PrintErrorAndBreak(object v)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(DEBUG_ERROR_TAG, v);
             DebugService.CurrentThreadInstance.PrintErrorAndBreak(v);
 #endif
@@ -118,7 +118,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void PrintPass(object v)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(DEBUG_PASS_TAG, v);
             DebugService.CurrentThreadInstance.PrintPass(v);
 #endif
@@ -126,7 +126,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void Print()
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(string.Empty, null);
             DebugService.CurrentThreadInstance.Print();
 #endif
@@ -134,7 +134,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void Print(object v)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(string.Empty, v);
             DebugService.CurrentThreadInstance.Print(v);
 #endif
@@ -142,7 +142,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void Print(string tag, object v)
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             OnPrint(tag, v);
             DebugService.CurrentThreadInstance.Print(tag, v);
 #endif
@@ -150,7 +150,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static void Break()
         {
-#if DEBUG || ENABLE_DRAGONECS_DEBUGGER
+#if DEBUG || DRAGONECS_ENABLE_DEBUG_SERVICE
             DebugService.CurrentThreadInstance.Break();
 #endif
         }
diff --git a/src/EcsPipeline.Builder.cs b/src/EcsPipeline.Builder.cs
index a44a608..d66f6d3 100644
--- a/src/EcsPipeline.Builder.cs
+++ b/src/EcsPipeline.Builder.cs
@@ -301,12 +301,12 @@ namespace DCFApixels.DragonECS
             #endregion
 
             #region Build
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             private static EcsProfilerMarker _buildMarker = new EcsProfilerMarker("EcsPipeline.Build");
 #endif
             public EcsPipeline Build()
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 _buildMarker.Begin();
 #endif
                 var it = new LinkedListIterator<SystemNode>(_systemNodes, _systemNodesCount, _startIndex);
@@ -372,7 +372,7 @@ namespace DCFApixels.DragonECS
                 {
                     item.Declare(pipeline);
                 }
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 _buildMarker.End();
 #endif
                 return pipeline;
diff --git a/src/EcsPipeline.cs b/src/EcsPipeline.cs
index 3c0d1be..6ad2331 100644
--- a/src/EcsPipeline.cs
+++ b/src/EcsPipeline.cs
@@ -45,7 +45,7 @@ namespace DCFApixels.DragonECS
         private bool _isInit = false;
         private bool _isDestoryed = false;
 
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
         private static EcsProfilerMarker _initMarker = new EcsProfilerMarker("EcsPipeline.Init");
 #endif
 
@@ -188,7 +188,7 @@ namespace DCFApixels.DragonECS
                 EcsDebug.PrintWarning($"This {nameof(EcsPipeline)} has already been initialized");
                 return;
             }
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             _initMarker.Begin();
 #endif
 
@@ -199,7 +199,7 @@ namespace DCFApixels.DragonECS
             _isInit = true;
 
             GC.Collect();
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             _initMarker.End();
 #endif
         }
@@ -207,7 +207,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Run()
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             if (!_isInit) { Throw.Pipeline_MethodCalledBeforeInitialisation(nameof(Run)); }
             if (_isDestoryed) { Throw.Pipeline_MethodCalledAfterDestruction(nameof(Run)); }
 #endif
@@ -215,7 +215,7 @@ namespace DCFApixels.DragonECS
         }
         public void Destroy()
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             if (!_isInit) { Throw.Pipeline_MethodCalledBeforeInitialisation(nameof(Destroy)); }
 #endif
             if (_isDestoryed)
diff --git a/src/EcsRunner.cs b/src/EcsRunner.cs
index 47f2cff..1b457ae 100644
--- a/src/EcsRunner.cs
+++ b/src/EcsRunner.cs
@@ -7,7 +7,6 @@ using System;
 using System.Linq;
 using System.Runtime.CompilerServices;
 using static DCFApixels.DragonECS.EcsDebugUtility;
-#pragma warning disable CS0162 // Обнаружен недостижимый код
 
 namespace DCFApixels.DragonECS
 {
@@ -132,6 +131,7 @@ namespace DCFApixels.DragonECS
             protected virtual void OnSetup() { }
             #endregion
 
+
             #region RunHelper
 #if DEBUG
             public
@@ -210,7 +210,7 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
                             throw;
 #endif
                             EcsDebug.PrintError(e);
@@ -226,10 +226,11 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
-                            throw;
-#endif
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
+                            throw e;
+#else
                             EcsDebug.PrintError(e);
+#endif
                         }
                     }
 #endif
@@ -249,7 +250,7 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
                             throw;
 #endif
                             EcsDebug.PrintError(e);
@@ -265,10 +266,11 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
-                            throw;
-#endif
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
+                            throw e;
+#else
                             EcsDebug.PrintError(e);
+#endif
                         }
                     }
 #endif
@@ -375,7 +377,7 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
                             throw;
 #endif
                             EcsDebug.PrintError(e);
@@ -398,10 +400,11 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
-                            throw;
-#endif
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
+                            throw e;
+#else
                             EcsDebug.PrintError(e);
+#endif
                         }
                         finally
                         {
@@ -429,7 +432,7 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
                             throw;
 #endif
                             EcsDebug.PrintError(e);
@@ -452,10 +455,11 @@ namespace DCFApixels.DragonECS
                         }
                         catch (Exception e)
                         {
-#if DISABLE_CATH_EXCEPTIONS
-                            throw;
-#endif
+#if DRAGONECS_DISABLE_CATH_EXCEPTIONS
+                            throw e;
+#else
                             EcsDebug.PrintError(e);
+#endif
                         }
                         finally
                         {
diff --git a/src/EcsStaticMask.cs b/src/EcsStaticMask.cs
index a84672f..b07197d 100644
--- a/src/EcsStaticMask.cs
+++ b/src/EcsStaticMask.cs
@@ -342,15 +342,19 @@ namespace DCFApixels.DragonECS
             #region Inc/Exc/Combine/Except
             public void Inc(EcsTypeCode typeCode)
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 if (_inc.Contains(typeCode) || _exc.Contains(typeCode)) { Throw.ConstraintIsAlreadyContainedInMask(typeCode); }
+#elif DRAGONECS_STABILITY_MODE
+                if (_inc.Contains(typeCode) || _exc.Contains(typeCode)) { return; }
 #endif
                 _inc.Add(typeCode);
             }
             public void Exc(EcsTypeCode typeCode)
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 if (_inc.Contains(typeCode) || _exc.Contains(typeCode)) { Throw.ConstraintIsAlreadyContainedInMask(typeCode); }
+#elif DRAGONECS_STABILITY_MODE
+                if (_inc.Contains(typeCode) || _exc.Contains(typeCode)) { return; }
 #endif
                 _exc.Add(typeCode);
             }
diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index caf7099..c0674d8 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -327,8 +327,10 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public int NewEntity(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (entityID < _entities.Length && IsUsed(entityID)) { Throw.World_EntityIsAlreadyСontained(entityID); }
+#if DEBUG
+            if (IsUsed(entityID)) { Throw.World_EntityIsAlreadyСontained(entityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (IsUsed(entityID)) { return 0; }
 #endif
             _entityDispenser.Use(entityID);
             CreateConcreteEntity(entityID);
@@ -377,8 +379,10 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void DelEntity(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (IsUsed(entityID) == false) { Throw.World_EntityIsNotContained(entityID); }
+#if DEBUG
+            if (IsUsed(entityID) == false) { Throw.World_EntityIsAlreadyСontained(entityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (IsUsed(entityID) == false) { return; }
 #endif
             UpVersion();
             _delEntBuffer[_delEntBufferCount++] = entityID;
@@ -407,8 +411,10 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void InitEntitySlot(int entityID, short gen)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Count > 0) { Throw.World_MethodCalledAfterEntityCreation(nameof(InitEntitySlot)); }
+#elif DRAGONECS_STABILITY_MODE
+            if (Count > 0) { return; }
 #endif
             _entityDispenser.Upsize(entityID);
             _entities[entityID].gen = gen;
@@ -427,8 +433,10 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public bool IsAlive(entlong entity)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (entity.GetWorldIDUnchecked() != ID) { Throw.World_MaskDoesntBelongWorld(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (entity.GetWorldIDUnchecked() != ID) { return false; }
 #endif
             ref var slot = ref _entities[entity.GetIDUnchecked()];
             return slot.gen == entity.GetIDUnchecked() && slot.isUsed;
@@ -464,8 +472,10 @@ namespace DCFApixels.DragonECS
         }
         public bool IsMatchesMask(EcsMask mask, int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (mask.WorldID != ID) { Throw.World_MaskDoesntBelongWorld(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (mask.WorldID != ID) { return false; }
 #endif
             for (int i = 0, iMax = mask._incs.Length; i < iMax; i++)
             {
diff --git a/src/EcsWorld.pools.cs b/src/EcsWorld.pools.cs
index 6ed215b..1c1d047 100644
--- a/src/EcsWorld.pools.cs
+++ b/src/EcsWorld.pools.cs
@@ -18,7 +18,7 @@ namespace DCFApixels.DragonECS
         internal PoolSlot[] _poolSlots;
         private int _poolsCount;
 
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
         private int _lockedPoolCount = 0;
 #endif
 
@@ -152,8 +152,10 @@ namespace DCFApixels.DragonECS
         #region FindOrAutoCreatePool/InitPool
         public void InitPool(IEcsPoolImplementation poolImplementation)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Count > 0) { Throw.World_MethodCalledAfterEntityCreation(nameof(InitEntitySlot)); }
+#elif DRAGONECS_STABILITY_MODE
+            if (Count > 0) { return; }
 #endif
             InitPool_Internal(poolImplementation);
         }
@@ -165,7 +167,7 @@ namespace DCFApixels.DragonECS
                 if (_poolTypeCode_2_CmpTypeIDs.TryGetValue(poolTypeCode, out int cmpTypeID))
                 {
                     var pool = _pools[cmpTypeID];
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
                     if ((pool is TPool) == false) { Throw.UndefinedException(); }
 #endif
                     return (TPool)pool;
@@ -282,12 +284,8 @@ namespace DCFApixels.DragonECS
             {
                 DelEntity(entityID);
             }
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (count < 0) Throw.World_InvalidIncrementComponentsBalance();
-#endif
+            CheckUnregisterValid(count, entityID);
         }
-
-
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private bool TryRegisterEntityComponent(int entityID, int componentTypeID, EcsMaskChunck maskBit)
         {
@@ -323,13 +321,29 @@ namespace DCFApixels.DragonECS
                 {
                     DelEntity(entityID);
                 }
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-                if (count < 0) Throw.World_InvalidIncrementComponentsBalance();
-#endif
+                CheckUnregisterValid(count, entityID);
                 return true;
             }
             return false;
         }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private void CheckUnregisterValid(int count, int entityID)
+        {
+#if DEBUG
+            if (count < 0) { Throw.World_InvalidIncrementComponentsBalance(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (count < 0)
+            {
+                for (int i = entityID << _entityComponentMaskLengthBitShift, iMax = i + _entityComponentMaskLength; i < iMax; i++)
+                { 
+                    _entityComponentMasks[i] = 0; 
+                }
+                //TODO добавить очистку пулов
+                _entities[entityID].componentsCount = 0;
+            }
+#endif
+        }
+
 
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private int GetPoolComponentCount(int componentTypeID)
@@ -402,7 +416,7 @@ namespace DCFApixels.DragonECS
         #region LockPool/UnLockPool
         public void LockPool_Debug(int componentTypeID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             ref var slot = ref _poolSlots[componentTypeID];
             if (slot.lockedCounter == 0)
             {
@@ -416,7 +430,7 @@ namespace DCFApixels.DragonECS
         }
         public void UnlockPool_Debug(int componentTypeID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             ref var slot = ref _poolSlots[componentTypeID];
             slot.lockedCounter--;
             if (slot.lockedCounter <= 0)
@@ -434,7 +448,7 @@ namespace DCFApixels.DragonECS
         }
         public bool CheckPoolLocked_Debug(int componentTypeID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             return _poolSlots[componentTypeID].lockedCounter != 0;
 #else
             return false;
@@ -447,7 +461,7 @@ namespace DCFApixels.DragonECS
         {
             public long version;
             public int count;
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             public int lockedCounter;
 #endif
         }
diff --git a/src/EcsWorld.static.cs b/src/EcsWorld.static.cs
index 8e76d0e..6e26f9f 100644
--- a/src/EcsWorld.static.cs
+++ b/src/EcsWorld.static.cs
@@ -41,6 +41,15 @@ namespace DCFApixels.DragonECS
         {// ts
             return _worlds[worldID];
         }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static bool TryGetWorld(short worldID, out EcsWorld world)
+        {// ts
+            world = _worlds[worldID];
+            return
+                world != null &&
+                world.IsDestroyed != false &&
+                worldID != 0;
+        }
 
         private void ReleaseData(short worldID)
         {// ts
@@ -146,7 +155,7 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             public static ref T GetForWorldUnchecked(short worldID)
             {// ts
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 if (_mapping[worldID] <= 0) { Throw.ArgumentOutOfRange(); }
 #endif
                 return ref _items[_mapping[worldID]];
diff --git a/src/Executors/EcsWhereExecutor.cs b/src/Executors/EcsWhereExecutor.cs
index 9ee401c..c35a6d6 100644
--- a/src/Executors/EcsWhereExecutor.cs
+++ b/src/Executors/EcsWhereExecutor.cs
@@ -74,7 +74,7 @@ namespace DCFApixels.DragonECS.Internal
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ExecuteFor_Iternal(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             if (span.IsNull) { Throw.ArgumentNull(nameof(span)); }
             if (span.WorldID != World.ID) { Throw.Quiery_ArgumentDifferentWorldsException(); }
 #endif
diff --git a/src/Executors/EcsWhereToGroupExecutor.cs b/src/Executors/EcsWhereToGroupExecutor.cs
index 150fde9..7765503 100644
--- a/src/Executors/EcsWhereToGroupExecutor.cs
+++ b/src/Executors/EcsWhereToGroupExecutor.cs
@@ -73,7 +73,7 @@ namespace DCFApixels.DragonECS.Internal
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         private void ExecuteFor_Iternal(EcsSpan span)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG || DRAGONECS_STABILITY_MODE
             if (span.IsNull) { Throw.ArgumentNull(nameof(span)); }
             if (span.WorldID != World.ID) { Throw.Quiery_ArgumentDifferentWorldsException(); }
 #endif
diff --git a/src/Injections/Injector.cs b/src/Injections/Injector.cs
index 151f612..7d3958f 100644
--- a/src/Injections/Injector.cs
+++ b/src/Injections/Injector.cs
@@ -16,7 +16,7 @@ namespace DCFApixels.DragonECS
         private Dictionary<Type, InjectionNodeBase> _nodes = new Dictionary<Type, InjectionNodeBase>(32);
         private bool _isInit = false;
 
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
         private HashSet<Type> _requiredInjectionTypes = new HashSet<Type>();
 #endif
 
@@ -50,7 +50,7 @@ namespace DCFApixels.DragonECS
                 branch = new InjectionBranch(this, objType);
                 InitBranch(branch);
 
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
                 foreach (var requiredInjectionType in _requiredInjectionTypes)
                 {
                     if (requiredInjectionType.IsAssignableFrom(objType))
@@ -144,7 +144,7 @@ namespace DCFApixels.DragonECS
             }
             _isInit = true;
 
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             var systems = _pipeline.AllSystems;
             var injectType = typeof(IEcsInject<>);
             foreach (var system in systems)
diff --git a/src/Pools/EcsPool.cs b/src/Pools/EcsPool.cs
index b20d19a..648af29 100644
--- a/src/Pools/EcsPool.cs
+++ b/src/Pools/EcsPool.cs
@@ -40,8 +40,8 @@ namespace DCFApixels.DragonECS
         private int _componentTypeID;
         private EcsMaskChunck _maskBit;
 
-        private int[] _mapping;// index = entityID / value = itemIndex;/ value = 0 = no entityID
-        private T[] _items; //dense
+        private int[] _mapping;// index = entityID / value = itemIndex;/ value = 0 = no entityID.
+        private T[] _items; // dense; _items[0] - fake component.
         private int _itemsCount = 0;
         private int _capacity = 0;
 
@@ -56,7 +56,7 @@ namespace DCFApixels.DragonECS
         private readonly IEcsComponentCopy<T> _componentCopyHandler = EcsComponentCopyHandler<T>.instance;
         private readonly bool _isHasComponentCopyHandler = EcsComponentCopyHandler<T>.isHasHandler;
 
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
         private StructList<IEcsPoolEventListener> _listeners = new StructList<IEcsPoolEventListener>(2);
         private int _listenersCachedCount = 0;
 #endif
@@ -100,16 +100,19 @@ namespace DCFApixels.DragonECS
         public ref T Add(int entityID)
         {
             ref int itemIndex = ref _mapping[entityID];
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (itemIndex > 0) { EcsPoolThrowHelper.ThrowAlreadyHasComponent<T>(entityID); }
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (itemIndex > 0) { return ref Get(entityID); }
+            if (_isLocked) { return ref _items[0]; }
 #endif
             itemIndex = GetFreeItemIndex(entityID);
             _mediator.RegisterComponent(entityID, _componentTypeID, _maskBit);
             ref T result = ref _items[itemIndex];
             _sparseEntities[itemIndex] = entityID;
             EnableComponent(ref result);
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
             _listeners.InvokeOnAddAndGet(entityID, _listenersCachedCount);
 #endif
 
@@ -125,10 +128,10 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public ref T Get(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG // �� ����� STAB_MODE
             if (!Has(entityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
 #endif
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
             _listeners.InvokeOnGet(entityID, _listenersCachedCount);
 #endif
             return ref _items[_mapping[entityID]];
@@ -136,7 +139,7 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public ref readonly T Read(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG // �� ����� STAB_MODE
             if (!Has(entityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
 #endif
             return ref _items[_mapping[entityID]];
@@ -153,22 +156,23 @@ namespace DCFApixels.DragonECS
             //}
 
 
-
-#if (DEBUG && !DISABLE_DEBUG) || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
-#endif
             ref int itemIndex = ref _mapping[entityID];
             if (itemIndex <= 0)
             { //Add block
+#if DEBUG
+                if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+                if (_isLocked) { return ref _items[0]; }
+#endif
                 itemIndex = GetFreeItemIndex(entityID);
                 _mediator.RegisterComponent(entityID, _componentTypeID, _maskBit);
                 _sparseEntities[itemIndex] = entityID;
                 EnableComponent(ref _items[itemIndex]);
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
                 _listeners.InvokeOnAdd(entityID, _listenersCachedCount);
 #endif
             } //Add block end
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
             _listeners.InvokeOnGet(entityID, _listenersCachedCount);
 #endif
 
@@ -188,12 +192,13 @@ namespace DCFApixels.DragonECS
         }
         public void Del(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
-#endif
             ref int itemIndex = ref _mapping[entityID];
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (itemIndex <= 0) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
+            if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (itemIndex <= 0) { return; }
+            if (_isLocked) { return; }
 #endif
             DisableComponent(ref _items[itemIndex]);
             _sparseEntities[itemIndex] = 0;
@@ -221,23 +226,29 @@ namespace DCFApixels.DragonECS
         }
         public void Copy(int fromEntityID, int toEntityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (!Has(fromEntityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(fromEntityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (!Has(fromEntityID)) { return; }
 #endif
             CopyComponent(ref Get(fromEntityID), ref TryAddOrGet(toEntityID));
         }
         public void Copy(int fromEntityID, EcsWorld toWorld, int toEntityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (!Has(fromEntityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(fromEntityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (!Has(fromEntityID)) { return; }
 #endif
             CopyComponent(ref Get(fromEntityID), ref toWorld.GetPool<T>().TryAddOrGet(toEntityID));
         }
 
         public void ClearAll()
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_isLocked) { return; }
 #endif
             if (_itemsCount <= 0) { return; }
             _itemsCount = 0;
@@ -248,7 +259,7 @@ namespace DCFApixels.DragonECS
                 DisableComponent(ref _items[itemIndex]);
                 itemIndex = 0;
                 _mediator.UnregisterComponent(entityID, _componentTypeID, _maskBit);
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
                 _listeners.InvokeOnDel(entityID, _listenersCachedCount);
 #endif
             }
@@ -441,7 +452,7 @@ namespace DCFApixels.DragonECS
 #endregion
 
         #region Listeners
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
         public void AddListener(IEcsPoolEventListener listener)
         {
             if (listener == null) { EcsPoolThrowHelper.ThrowNullListener(); }
diff --git a/src/Pools/EcsPoolBase.cs b/src/Pools/EcsPoolBase.cs
index 8b2a067..172f933 100644
--- a/src/Pools/EcsPoolBase.cs
+++ b/src/Pools/EcsPoolBase.cs
@@ -164,7 +164,7 @@ namespace DCFApixels.DragonECS.Internal
         #endregion
 
         #region Listeners
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
         void IEcsReadonlyPool.AddListener(IEcsPoolEventListener listener) { }
         void IEcsReadonlyPool.RemoveListener(IEcsPoolEventListener listener) { }
 #endif
@@ -193,7 +193,7 @@ namespace DCFApixels.DragonECS
         void Copy(int fromEntityID, EcsWorld toWorld, int toEntityID);
         #endregion
 
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
         #region Add/Remove Listeners
         void AddListener(IEcsPoolEventListener listener);
         void RemoveListener(IEcsPoolEventListener listener);
@@ -249,6 +249,18 @@ namespace DCFApixels.DragonECS
         {
             return self == null || self == EcsNullPool.instance;
         }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static ref T NewEntity<T>(this IEcsStructPool<T> self) where T : struct
+        {
+            var e = self.World.NewEntity();
+            return ref self.Add(e);
+        }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public static ref T NewEntity<T>(this IEcsStructPool<T> self, out int entityID) where T : struct
+        {
+            entityID = self.World.NewEntity();
+            return ref self.Add(entityID);
+        }
     }
     #endregion
 
@@ -262,7 +274,7 @@ namespace DCFApixels.DragonECS
         /// <summary>Called after deleting an entity from the pool</summary>
         void OnDel(int entityID);
     }
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
     public static class PoolEventListExtensions
     {
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
diff --git a/src/Pools/EcsTagPool.cs b/src/Pools/EcsTagPool.cs
index 5bc9694..b7626d3 100644
--- a/src/Pools/EcsTagPool.cs
+++ b/src/Pools/EcsTagPool.cs
@@ -2,14 +2,14 @@
 #undef DEBUG
 #endif
 using DCFApixels.DragonECS.Core;
+using DCFApixels.DragonECS.Internal;
 using DCFApixels.DragonECS.PoolsCore;
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.Runtime.CompilerServices;
-using System.Diagnostics;
-using DCFApixels.DragonECS.Internal;
 using System.ComponentModel;
+using System.Diagnostics;
+using System.Runtime.CompilerServices;
 #if ENABLE_IL2CPP
 using Unity.IL2CPP.CompilerServices;
 #endif
@@ -42,7 +42,7 @@ namespace DCFApixels.DragonECS
         private bool[] _mapping;// index = entityID / value = itemIndex;/ value = 0 = no entityID
         private int _count = 0;
 
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
         private StructList<IEcsPoolEventListener> _listeners = new StructList<IEcsPoolEventListener>(2);
         private int _listenersCachedCount = 0;
 #endif
@@ -103,14 +103,16 @@ namespace DCFApixels.DragonECS
         #region Method
         public void Add(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID)) { EcsPoolThrowHelper.ThrowAlreadyHasComponent<T>(entityID); }
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (Has(entityID) || _isLocked) { return; }
 #endif
             _count++;
             _mapping[entityID] = true;
             _mediator.RegisterComponent(entityID, _componentTypeID, _maskBit);
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
             _listeners.InvokeOnAdd(entityID, _listenersCachedCount);
 #endif
         }
@@ -128,14 +130,16 @@ namespace DCFApixels.DragonECS
         }
         public void Del(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (!Has(entityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (!Has(entityID) || _isLocked) { return; }
 #endif
             _mapping[entityID] = false;
             _count--;
             _mediator.UnregisterComponent(entityID, _componentTypeID, _maskBit);
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
             _listeners.InvokeOnDel(entityID, _listenersCachedCount);
 #endif
         }
@@ -149,15 +153,19 @@ namespace DCFApixels.DragonECS
         }
         public void Copy(int fromEntityID, int toEntityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (!Has(fromEntityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(fromEntityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (!Has(fromEntityID)) { return; }
 #endif
             TryAdd(toEntityID);
         }
         public void Copy(int fromEntityID, EcsWorld toWorld, int toEntityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (!Has(fromEntityID)) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(fromEntityID); }
+#elif DRAGONECS_STABILITY_MODE
+            if (!Has(fromEntityID)) { return; }
 #endif
             toWorld.GetPool<T>().TryAdd(toEntityID);
         }
@@ -189,8 +197,10 @@ namespace DCFApixels.DragonECS
 
         public void ClearAll()
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (_isLocked) { EcsPoolThrowHelper.ThrowPoolLocked(); }
+#elif DRAGONECS_STABILITY_MODE
+            if (_isLocked) { return; }
 #endif
             if (_count <= 0) { return; }
             var span = _source.Where(out SingleTagAspect<T> _);
@@ -199,7 +209,7 @@ namespace DCFApixels.DragonECS
             {
                 _mapping[entityID] = false;
                 _mediator.UnregisterComponent(entityID, _componentTypeID, _maskBit);
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
                 _listeners.InvokeOnDel(entityID, _listenersCachedCount);
 #endif
             }
@@ -245,14 +255,14 @@ namespace DCFApixels.DragonECS
         void IEcsPool.AddRaw(int entityID, object dataRaw) { Add(entityID); }
         object IEcsReadonlyPool.GetRaw(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID) == false) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
 #endif
             return _fakeComponent;
         }
         void IEcsPool.SetRaw(int entityID, object dataRaw)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID) == false) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
 #endif
         }
@@ -263,14 +273,14 @@ namespace DCFApixels.DragonECS
         }
         ref readonly T IEcsStructPool<T>.Read(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID) == false) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
 #endif
             return ref _fakeComponent;
         }
         ref T IEcsStructPool<T>.Get(int entityID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
+#if DEBUG
             if (Has(entityID) == false) { EcsPoolThrowHelper.ThrowNotHaveComponent<T>(entityID); }
 #endif
             return ref _fakeComponent;
@@ -278,7 +288,7 @@ namespace DCFApixels.DragonECS
         #endregion
 
         #region Listeners
-#if !DISABLE_POOLS_EVENTS
+#if !DRAGONECS_DISABLE_POOLS_EVENTS
         public void AddListener(IEcsPoolEventListener listener)
         {
             if (listener == null) { EcsPoolThrowHelper.ThrowNullListener(); }
@@ -363,14 +373,14 @@ namespace DCFApixels.DragonECS
 
         //---------------------------------------------------
 
-        [Obsolete("Use " + nameof(EcsAspect) + "." + nameof(EcsAspect.Builder) + "." + nameof(GetPool) + "<T>()")]
+        [Obsolete("Use " + nameof(EcsWorld) + "." + nameof(GetPool) + "<T>()")]
         [EditorBrowsable(EditorBrowsableState.Never)]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static EcsTagPool<TTagComponent> GetTagPool<TTagComponent>(this EcsWorld self) where TTagComponent : struct, IEcsTagComponent
         {
             return self.GetPoolInstance<EcsTagPool<TTagComponent>>();
         }
-        [Obsolete("Use " + nameof(EcsAspect) + "." + nameof(EcsAspect.Builder) + "." + nameof(GetPoolUnchecked) + "<T>()")]
+        [Obsolete("Use " + nameof(EcsWorld) + "." + nameof(GetPoolUnchecked) + "<T>()")]
         [EditorBrowsable(EditorBrowsableState.Never)]
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public static EcsTagPool<TTagComponent> GetTagPoolUnchecked<TTagComponent>(this EcsWorld self) where TTagComponent : struct, IEcsTagComponent
diff --git a/src/entlong.cs b/src/entlong.cs
index 43994c1..d7e64d3 100644
--- a/src/entlong.cs
+++ b/src/entlong.cs
@@ -59,8 +59,10 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-                if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+                if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+                if (IsAlive == false) { return EcsConsts.NULL_ENTITY_ID; }
 #endif
                 return _id;
             }
@@ -70,8 +72,10 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-                if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+                if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+                if (IsAlive == false) { return default; }
 #endif
                 return _gen;
             }
@@ -81,8 +85,8 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-                if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+                if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
 #endif
                 return GetWorld_Internal();
             }
@@ -92,8 +96,10 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get
             {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-                if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+                if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+                if (IsAlive == false) { return EcsConsts.NULL_WORLD_ID; }
 #endif
                 return _world;
             }
@@ -144,8 +150,15 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Unpack(out int id, out EcsWorld world)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+            if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+            if (IsAlive == false)
+            {
+                world = EcsWorld.GetWorld(EcsConsts.NULL_WORLD_ID);
+                id = EcsConsts.NULL_ENTITY_ID;
+                return;
+            }
 #endif
             world = EcsWorld.GetWorld(_world);
             id = _id;
@@ -153,8 +166,16 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Unpack(out int id, out short gen, out EcsWorld world)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+            if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+            if (IsAlive == false)
+            {
+                world = EcsWorld.GetWorld(EcsConsts.NULL_WORLD_ID);
+                gen = default;
+                id = EcsConsts.NULL_ENTITY_ID;
+                return;
+            }
 #endif
             world = EcsWorld.GetWorld(_world);
             gen = _gen;
@@ -163,8 +184,15 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Unpack(out int id, out short worldID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+            if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+            if (IsAlive == false)
+            {
+                worldID = EcsConsts.NULL_WORLD_ID;
+                id = EcsConsts.NULL_ENTITY_ID;
+                return;
+            }
 #endif
             worldID = _world;
             id = _id;
@@ -172,8 +200,16 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Unpack(out int id, out short gen, out short worldID)
         {
-#if DEBUG || ENABLE_DRAGONECS_ASSERT_CHEKS
-            if (!IsAlive) { Throw.Ent_ThrowIsNotAlive(this); }
+#if DEBUG
+            if (IsAlive == false) { Throw.Ent_ThrowIsNotAlive(this); }
+#elif DRAGONECS_STABILITY_MODE
+            if (IsAlive == false)
+            {
+                worldID = EcsConsts.NULL_WORLD_ID;
+                gen = default;
+                id = EcsConsts.NULL_ENTITY_ID;
+                return;
+            }
 #endif
             worldID = _world;
             gen = _gen;
@@ -296,7 +332,13 @@ namespace DCFApixels.DragonECS
 
         #region Other
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        private EcsWorld GetWorld_Internal() { return EcsWorld.GetWorld(_world); }
+        private EcsWorld GetWorld_Internal()
+        {
+#if DRAGONECS_STABILITY_MODE
+            if (IsAlive == false) { EcsWorld.GetWorld(EcsConsts.NULL_WORLD_ID); }
+#endif
+            return EcsWorld.GetWorld(_world);
+        }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public override int GetHashCode() { return unchecked((int)_full) ^ (int)(_full >> 32); }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]