diff --git a/src/EcsGroup.cs b/src/EcsGroup.cs
index 9a25f35..ee0a76e 100644
--- a/src/EcsGroup.cs
+++ b/src/EcsGroup.cs
@@ -2,7 +2,6 @@
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
 using Unity.Profiling;
-using static UnityEngine.Networking.UnityWebRequest;
 using delayedOp = System.Int32;
 
 namespace DCFApixels.DragonECS
@@ -38,6 +37,11 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get => _source.CapacitySparce;
         }
+        public bool IsReleazed
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _source.IsReleazed;
+        }
         #endregion
 
         #region Methods
@@ -46,10 +50,10 @@ namespace DCFApixels.DragonECS
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public EcsGroup.Enumerator GetEnumerator() => _source.GetEnumerator();
 
-        public EcsGroup Extract()
-        {
-            return new EcsGroup(_source);
-        }
+        /// <summary>Equivalent of the EcsGroup.Clone() method</summary>
+        /// <returns>An editable clone of this EcsReadnolyGroup</returns>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public EcsGroup Extract() => _source.Clone();
         #endregion
 
         #region Object
@@ -59,24 +63,41 @@ namespace DCFApixels.DragonECS
                 return _source.ToString();
             return "NULL";
         }
+        public override int GetHashCode() => _source.GetHashCode();
+        public override bool Equals(object obj) => obj is EcsGroup group && group == this;
+        public bool Equals(EcsReadonlyGroup other) => _source == other._source;
         #endregion
 
         #region Internal
-        internal void Release()
-        {
-            _source.World.ReleaseGroup(_source);
-        }
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         internal EcsGroup GetGroupInternal() => _source;
 
         #endregion
+
+        #region operators
+        public static bool operator ==(EcsReadonlyGroup a, EcsReadonlyGroup b) => a.Equals(b);
+        public static bool operator ==(EcsReadonlyGroup a, EcsGroup b) => a.Equals(b);
+        public static bool operator !=(EcsReadonlyGroup a, EcsReadonlyGroup b) => !a.Equals(b);
+        public static bool operator !=(EcsReadonlyGroup a, EcsGroup b) => !a.Equals(b);
+        #endregion
+
+        #region Dispose/Release
+        public void Dispose()
+        {
+            _source.Dispose();
+        }
+        public void Release()
+        {
+            _source.World.ReleaseGroup(_source);
+        }
+        #endregion
     }
 
     // не может содержать значение 0
     // _delayedOps это int[] для отложенных операций, хранятся отложенные операции в виде int значения, если старший бит = 0 то это опреация добавленияб если = 1 то это операция вычитания
 
     // this collection can only store numbers greater than 0
-    public unsafe class EcsGroup
+    public unsafe class EcsGroup : IDisposable, IEquatable<EcsGroup>
     {
         private const int DEALAYED_ADD = 0;
         private const int DEALAYED_REMOVE = int.MinValue;
@@ -93,6 +114,8 @@ namespace DCFApixels.DragonECS
 
         private int _lockCount;
 
+        private bool _isReleazed = true; 
+
         #region Properties
         public IEcsWorld World => _source;
         public int Count
@@ -115,16 +138,25 @@ namespace DCFApixels.DragonECS
             [MethodImpl(MethodImplOptions.AggressiveInlining)]
             get => new EcsReadonlyGroup(this);
         }
+        public bool IsReleazed
+        {
+            [MethodImpl(MethodImplOptions.AggressiveInlining)]
+            get => _isReleazed;
+        }
         #endregion
 
         #region Constrcutors
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public EcsGroup(IEcsWorld source, int denseCapacity = 64, int delayedOpsCapacity = 128)
+        public static EcsGroup New(IEcsWorld world)
         {
-            _source = source;
+            return world.GetGroupFromPool();
+        }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal EcsGroup(IEcsWorld world, int denseCapacity = 64, int delayedOpsCapacity = 128)
+        {
+            _source = world;
             _source.RegisterGroup(this);
             _dense = new int[denseCapacity];
-            _sparse = new int[source.EntitesCapacity];
+            _sparse = new int[world.EntitesCapacity];
 
             _delayedOps = new delayedOp[delayedOpsCapacity];
 
@@ -132,31 +164,13 @@ namespace DCFApixels.DragonECS
             _delayedOpsCount = 0;
             _count = 0;
         }
-
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public EcsGroup(EcsGroup copyFrom, int delayedOpsCapacity = 128)
-        {
-            _source = copyFrom._source;
-            _source.RegisterGroup(this);
-            _dense = new int[copyFrom._dense.Length];
-            _sparse = new int[copyFrom._sparse.Length];
-
-            _delayedOps = new delayedOp[delayedOpsCapacity];
-
-            _lockCount = 0;
-            _delayedOpsCount = 0;
-            _count = 0;
-
-            foreach (var item in copyFrom)
-                AggressiveAdd(item.id);
-        }
         #endregion
 
         #region Contains
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public bool Contains(int entityID)
         {
-            return  _sparse[entityID] > 0;
+            return _sparse[entityID] > 0;
         }
         #endregion
 
@@ -229,12 +243,7 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        internal void OnWorldResize(int newSize)
-        {
-            Array.Resize(ref _sparse, newSize);
-        }
-
+        #region Sort/Clear
         public void Sort()
         {
             int increment = 1;
@@ -247,9 +256,20 @@ namespace DCFApixels.DragonECS
                 }
             }
         }
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public void Clear() => _count = 0;
 
+        public void Clear()
+        {
+            _count = 0;
+            for (int i = 0; i < _dense.Length; i++)
+                _dense[i] = 0;
+            for (int i = 0; i < _sparse.Length; i++)
+                _sparse[i] = 0;
+        }
+        #endregion
+
+        #region CopyFrom/Clone
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void CopyFrom(EcsReadonlyGroup group) => CopyFrom(group.GetGroupInternal());
         public void CopyFrom(EcsGroup group)
         {
 #if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
@@ -259,29 +279,20 @@ namespace DCFApixels.DragonECS
             foreach (var item in group)
                 AggressiveAdd(item.id);
         }
-        public void CopyFrom(EcsReadonlyGroup group)
+        public EcsGroup Clone()
         {
-#if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
-            if (group.World != _source) throw new ArgumentException("groupFilter.World != World");
-#endif
-            Clear();
-            foreach (var item in group)
-                AggressiveAdd(item.id);
+            EcsGroup result = _source.GetGroupFromPool();
+            result.CopyFrom(this);
+            return result;
         }
+        #endregion
 
         #region Set operations
         /// <summary>as Union sets</summary>
-        public void AddGroup(EcsGroup group)
-        {
-#if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
-            if (_source != group.World) throw new ArgumentException("World != groupFilter.World");
-#endif
-            foreach (var item in group)
-                if (!Contains(item.id))
-                    AggressiveAdd(item.id);
-        }
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void UnionWith(EcsReadonlyGroup group) => UnionWith(group.GetGroupInternal());
         /// <summary>as Union sets</summary>
-        public void AddGroup(EcsReadonlyGroup group)
+        public void UnionWith(EcsGroup group)
         {
 #if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
             if (_source != group.World) throw new ArgumentException("World != groupFilter.World");
@@ -290,8 +301,12 @@ namespace DCFApixels.DragonECS
                 if (!Contains(item.id))
                     AggressiveAdd(item.id);
         }
+
         /// <summary>as Except sets</summary>
-        public void RemoveGroup(EcsGroup group)
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void ExceptWith(EcsReadonlyGroup group) => ExceptWith(group.GetGroupInternal());
+        /// <summary>as Except sets</summary>
+        public void ExceptWith(EcsGroup group)
         {
 #if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
             if (_source != group.World) throw new ArgumentException("World != groupFilter.World");
@@ -300,16 +315,10 @@ namespace DCFApixels.DragonECS
                 if (group.Contains(item.id))
                     AggressiveRemove(item.id);
         }
-        /// <summary>as Except sets</summary>
-        public void RemoveGroup(EcsReadonlyGroup group)
-        {
-#if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
-            if (_source != group.World) throw new ArgumentException("World != groupFilter.World");
-#endif
-            foreach (var item in group)
-                if (Contains(item.id))
-                    AggressiveRemove(item.id);
-        }
+
+        /// <summary>as Intersect sets</summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void AndWith(EcsReadonlyGroup group) => AndWith(group.GetGroupInternal());
         /// <summary>as Intersect sets</summary>
         public void AndWith(EcsGroup group)
         {
@@ -320,33 +329,15 @@ namespace DCFApixels.DragonECS
                 if (!group.Contains(item.id))
                     AggressiveRemove(item.id);
         }
-        /// <summary>as Intersect sets</summary>
-        public void AndWith(EcsReadonlyGroup group)
-        {
-#if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
-            if (World != group.World) throw new ArgumentException("World != groupFilter.World");
-#endif
-            foreach (var item in this)
-                if (!group.Contains(item.id))
-                    AggressiveRemove(item.id);
-        }
+
+        /// <summary>as Symmetric Except sets</summary>
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        public void XorWith(EcsReadonlyGroup group) => XorWith(group.GetGroupInternal());
         /// <summary>as Symmetric Except sets</summary>
         public void XorWith(EcsGroup group)
         {
 #if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
             if (_source != group.World) throw new ArgumentException("World != groupFilter.World");
-#endif
-            foreach (var item in group)
-                if (Contains(item.id))
-                    AggressiveRemove(item.id);
-                else
-                    AggressiveAdd(item.id);
-        }
-        /// <summary>as Symmetric Except sets</summary>
-        public void XorWith(EcsReadonlyGroup group)
-        {
-#if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
-            if (_source != group.World) throw new ArgumentException("World != groupFilter.World");
 #endif
             foreach (var item in group)
                 if (Contains(item.id))
@@ -358,7 +349,8 @@ namespace DCFApixels.DragonECS
 
         #region Static Set operations
         /// <summary>as Except sets</summary>
-        public static EcsReadonlyGroup Remove(EcsGroup a, EcsGroup b)
+        /// <returns>new group from pool</returns>
+        public static EcsGroup Except(EcsGroup a, EcsGroup b)
         {
 #if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
             if (a._source != b._source) throw new ArgumentException("a.World != b.World");
@@ -368,10 +360,11 @@ namespace DCFApixels.DragonECS
                 if (!b.Contains(item.id))
                     result.AggressiveAdd(item.id);
             a._source.ReleaseGroup(a);
-            return result.Readonly;
+            return result;
         }
         /// <summary>as Intersect sets</summary>
-        public static EcsReadonlyGroup And(EcsGroup a, EcsGroup b)
+        /// <returns>new group from pool</returns>
+        public static EcsGroup And(EcsGroup a, EcsGroup b)
         {
 #if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
             if (a._source != b._source) throw new ArgumentException("a.World != b.World");
@@ -381,7 +374,21 @@ namespace DCFApixels.DragonECS
                 if (b.Contains(item.id))
                     result.AggressiveAdd(item.id);
             a._source.ReleaseGroup(a);
-            return result.Readonly;
+            return result;
+        }
+        /// <summary>as Intersect sets</summary>
+        /// <returns>new group from pool</returns>
+        public static EcsGroup Union(EcsGroup a, EcsGroup b)
+        {
+#if (DEBUG && !DISABLE_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
+            if (a._source != b._source) throw new ArgumentException("a.World != b.World");
+#endif
+            EcsGroup result = a._source.GetGroupFromPool();
+            foreach (var item in a)
+                result.AggressiveAdd(item.id);
+            foreach (var item in a)
+                result.Add(item.id);
+            return result;
         }
         #endregion
 
@@ -450,6 +457,51 @@ namespace DCFApixels.DragonECS
         {
             return string.Join(", ", _dense.AsSpan(1, _count).ToArray());
         }
+        public override bool Equals(object obj) => obj is EcsGroup group && Equals(group);
+        public bool Equals(EcsReadonlyGroup other) => Equals(other.GetGroupInternal());
+        public bool Equals(EcsGroup other)
+        {
+            if (other.Count != Count)
+                return false;
+            foreach (var item in other)
+                if (!Contains(item.id))
+                    return false;
+            return true;
+        }
+        public override int GetHashCode() 
+        {
+            int hash = 0;
+            foreach (var item in this)
+                hash ^= 1 << (item.id % 32); //реализация от балды, так как не нужен, но фишка в том что хеш не учитывает порядок сущьностей, что явлется правильным поведением.
+            return hash;
+        }
+        #endregion
+
+        #region operators
+        public static bool operator ==(EcsGroup a, EcsGroup b) => a.Equals(b);
+        public static bool operator ==(EcsGroup a, EcsReadonlyGroup b) => a.Equals(b);
+        public static bool operator !=(EcsGroup a, EcsGroup b) => !a.Equals(b);
+        public static bool operator !=(EcsGroup a, EcsReadonlyGroup b) => !a.Equals(b);
+        #endregion
+
+        #region OnWorldResize
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        internal void OnWorldResize(int newSize)
+        {
+            Array.Resize(ref _sparse, newSize);
+        }
+        #endregion
+
+        #region IDisposable/Release
+        public void Dispose()
+        {
+            Release();
+        }
+        public void Release()
+        {
+            _isReleazed = true;
+            _source.ReleaseGroup(this);
+        }
         #endregion
     }
 
diff --git a/src/EcsPool.cs b/src/EcsPool.cs
index 8d7674d..682e784 100644
--- a/src/EcsPool.cs
+++ b/src/EcsPool.cs
@@ -10,7 +10,6 @@ namespace DCFApixels.DragonECS
         public Type ComponentType { get; }
         public int ComponentID { get; }
         public IEcsWorld World { get; }
-        public EcsReadonlyGroup Entities { get; }
         public int Count { get; }
         public int Capacity { get; }
         public bool Has(int entityID);
@@ -34,7 +33,6 @@ namespace DCFApixels.DragonECS
         public Type ComponentType => typeof(NullComponent);
         public int ComponentID => -1;
         public IEcsWorld World => _source;
-        public EcsReadonlyGroup Entities => default;
         public int Count => 0;
         public int Capacity => 1;
         public void Del(int index) { }
@@ -47,7 +45,6 @@ namespace DCFApixels.DragonECS
     }
     public abstract class EcsPool
     {
-        internal EcsGroup entities;
         public abstract bool Has(int entityID);
         internal abstract void OnWorldResize(int newSize);
     }
@@ -66,7 +63,6 @@ namespace DCFApixels.DragonECS
         private IEcsComponentReset<T> _componentResetHandler;
         private PoolRunnres _poolRunnres;
         #region Properites
-        public EcsReadonlyGroup Entities => entities.Readonly;
         public int Count => _itemsCount;
         public int Capacity => _items.Length;
         public IEcsWorld World => _source;
@@ -77,7 +73,6 @@ namespace DCFApixels.DragonECS
         #region Constructors
         internal EcsPool(IEcsWorld source, int id, int capacity, PoolRunnres poolRunnres)
         {
-            entities = new EcsGroup(source);
             _source = source;
             _componentID = id;
 
@@ -105,7 +100,6 @@ namespace DCFApixels.DragonECS
                 ref int itemIndex = ref _mapping[entityID];
                 if (itemIndex <= 0)
                 {
-                    entities.Add(entityID);
                     if (_recycledItemsCount > 0)
                     {
                         itemIndex = _recycledItems[--_recycledItemsCount];
@@ -147,8 +141,6 @@ namespace DCFApixels.DragonECS
         {
           //  using (_delMark.Auto())
           //   {
-            entities.Remove(entityID);
-
             if (_recycledItemsCount >= _recycledItems.Length)
                 Array.Resize(ref _recycledItems, _recycledItems.Length << 1);
             _recycledItems[_recycledItemsCount++] = _mapping[entityID];
@@ -168,7 +160,7 @@ namespace DCFApixels.DragonECS
 
         #region Object
         public override bool Equals(object obj) => base.Equals(obj);
-        public override int GetHashCode() => _source.GetHashCode() + ~ComponentID;
+        public override int GetHashCode() => _source.GetHashCode() ^ ~ComponentID;
         #endregion
 
         #region Internal
diff --git a/src/EcsQuery.cs b/src/EcsQuery.cs
index c081e18..35c8143 100644
--- a/src/EcsQuery.cs
+++ b/src/EcsQuery.cs
@@ -16,46 +16,37 @@ namespace DCFApixels.DragonECS
 
         private ProfilerMarker _getEnumerator = new ProfilerMarker("EcsQuery.GetEnumerator");
 
+
         public EcsGroup.Enumerator GetEnumerator()
         {
             using (_getEnumerator.Auto())
             {
-                // groupFilter.Clear();
-                 var pools = World.GetAllPools();
-                //
-                // if (mask.Inc.Length > 0)
-                // {
-                //     groupFilter.CopyFrom(pools[mask.Inc[0]].entities);
-                //     for (int i = 1; i < mask.Inc.Length; i++)
-                //     {
-                //         groupFilter.AndWith(pools[mask.Inc[i]].entities);
-                //     }
-                // }
-                // else
-                // {
-                //     groupFilter.CopyFrom(World.Entities);
-                // }
-                // for (int i = 0; i < mask.Exc.Length; i++)
-                // {
-                //     groupFilter.RemoveGroup(pools[mask.Exc[i]].entities);
-                // }
-                //
-                // groupFilter.Sort();
-                // return groupFilter.GetEnumerator();
-                //
-                EcsReadonlyGroup sum = World.Entities;
-                for (int i = 0; i < mask.Inc.Length; i++)
+                var pools = World.GetAllPools();
+
+                EcsReadonlyGroup all = World.Entities;
+                groupFilter.Clear();
+                foreach (var e in all)
                 {
-                    sum = EcsGroup.And(sum.GetGroupInternal(), pools[mask.Inc[i]].entities);
-                   // Debug.Log("inc " + sum.ToString());
+                    int entityID = e.id;
+
+                    for (int i = 0, iMax = mask.Inc.Length; i < iMax; i++)
+                    {
+                        if (!pools[mask.Inc[i]].Has(entityID))
+                        {
+                            continue;
+                        }
+                    }
+                    for (int i = 0, iMax = mask.Exc.Length; i < iMax; i++)
+                    {
+                        if (pools[mask.Exc[i]].Has(entityID))
+                        {
+                            continue;
+                        }
+                    }
+                    groupFilter.AggressiveAdd(entityID);
                 }
-                for (int i = 0; i < mask.Exc.Length; i++)
-                {
-                    sum = EcsGroup.Remove(sum.GetGroupInternal(), pools[mask.Exc[i]].entities);
-                   // Debug.Log("exc " + sum.ToString());
-                }
-                //sum.GetGroupInternal().Sort();
-                return sum.GetEnumerator();
+                groupFilter.Sort();
+                return groupFilter.GetEnumerator();
             }
         }
         protected virtual void Init(Builder b) { }
@@ -85,7 +76,8 @@ namespace DCFApixels.DragonECS
                 }
 
                 builder.End(out newQuery.mask);
-                newQuery.groupFilter = new EcsGroup(world);
+                // newQuery.groupFilter = new EcsGroup(world);
+                newQuery.groupFilter = EcsGroup.New(world);
                 return (TQuery)(object)newQuery;
             }
 
@@ -96,7 +88,6 @@ namespace DCFApixels.DragonECS
                 _exc = new List<int>(4);
             }
 
-            #region Init query member methods
             public override inc<TComponent> Include<TComponent>() where TComponent : struct
             {
                 _inc.Add(_world.GetComponentID<TComponent>());
@@ -111,18 +102,14 @@ namespace DCFApixels.DragonECS
             {
                 return new opt<TComponent>(_world.GetPool<TComponent>());
             }
-            #endregion
 
             private void End(out EcsQueryMask mask)
             {
                 _inc.Sort();
                 _exc.Sort();
                 mask = new EcsQueryMask(_world.ArchetypeType, _inc.ToArray(), _exc.ToArray());
-
                 _world = null;
-                _inc.Clear();
                 _inc = null;
-                _exc.Clear();
                 _exc = null;
             }
         }
diff --git a/src/EcsTable.cs b/src/EcsTable.cs
deleted file mode 100644
index 152beb7..0000000
--- a/src/EcsTable.cs
+++ /dev/null
@@ -1,67 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Runtime.CompilerServices;
-using System.Text;
-using System.Threading.Tasks;
-
-namespace DCFApixels.DragonECS
-{
-    public class EcsTable
-    {
-        private IEcsPool[] _pools;
-        private EcsNullPool _nullPool;
-
-        private short[] _gens;
-        private short[] _componentCounts;
-
-        private int _entitiesCount;
-
-        private List<EcsQuery>[] _filtersByIncludedComponents;
-        private List<EcsQuery>[] _filtersByExcludedComponents;
-
-        private EcsQuery[] _queries;
-
-        private List<EcsGroup> _groups;
-
-
-        #region Properties
-        public int Count => _entitiesCount;
-        public int Capacity => _gens.Length;
-        public ReadOnlySpan<IEcsPool> GetAllPools() => new ReadOnlySpan<IEcsPool>(_pools);
-        #endregion
-
-        #region internal Add/Has/Remove
-        internal void Add(int entityID)
-        {
-            int entity;
-            if (_entitiesCount >= _gens.Length)
-            {
-                Array.Resize(ref _gens, _gens.Length << 1);
-                Array.Resize(ref _componentCounts, _componentCounts.Length << 1);
-            }
-            _gens[_entitiesCount++]++;
-            _componentCounts[_entitiesCount++] = 0;
-
-            // if (_gens.Length <= entityID)
-            // {
-            //     //TODO есть проблема что если передать слишком большой id такой алогоритм не сработает
-            // }
-
-
-        }
-        internal void Has(int entityID)
-        {
-
-        }
-        internal void Remove(int entityID)
-        {
-
-        }
-        #endregion
-
-        //public int GetComponentID<T>() => ;
-    }
-
-
-}
diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index 79b9c6d..99f65e1 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -33,7 +33,7 @@ namespace DCFApixels.DragonECS
 
     public abstract class EcsWorld
     {
-        internal static IEcsWorld[] Worlds = new IEcsWorld[8];
+        public static IEcsWorld[] Worlds = new IEcsWorld[8];
         private static IntDispenser _worldIdDispenser = new IntDispenser(0);
 
         public readonly short id;
@@ -196,18 +196,12 @@ namespace DCFApixels.DragonECS
         }
         #endregion
 
-        #region IsMaskCompatible/IsMaskCompatibleWithout
-        [MethodImpl(MethodImplOptions.AggressiveInlining)]
-        public bool IsMaskCompatible<TInc>(int entityID) where TInc : struct, IInc
-        {
-            return IsMaskCompatible(EcsMaskMap<TWorldArchetype>.GetMask<TInc, Exc>(), entityID);
-        }
+        #region IsMaskCompatible
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public bool IsMaskCompatible<TInc, TExc>(int entityID) where TInc : struct, IInc where TExc : struct, IExc
         {
             return IsMaskCompatible(EcsMaskMap<TWorldArchetype>.GetMask<TInc, TExc>(), entityID);
         }
-
         public bool IsMaskCompatible(EcsComponentMask mask, int entityID)
         {
 #if (DEBUG && !DISABLE_DRAGONECS_DEBUG) || !DRAGONECS_NO_SANITIZE_CHECKS
@@ -348,9 +342,7 @@ namespace DCFApixels.DragonECS
         EcsGroup IEcsWorld.GetGroupFromPool()
         {
             if (_pool.Count <= 0)
-            {
                 return new EcsGroup(this);
-            }
             return _pool.Pop();
         }
         void IEcsWorld.ReleaseGroup(EcsGroup group)
diff --git a/src/Entities/ent.cs b/src/Entities/ent.cs
index b4bee19..c5ddd38 100644
--- a/src/Entities/ent.cs
+++ b/src/Entities/ent.cs
@@ -1,5 +1,6 @@
 using System.Runtime.CompilerServices;
 using System.Runtime.InteropServices;
+using UnityEngine.Rendering;
 
 namespace DCFApixels.DragonECS
 {
diff --git a/src/TestPool.cs b/src/TestPool.cs
new file mode 100644
index 0000000..a34ae1a
--- /dev/null
+++ b/src/TestPool.cs
@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace DCFApixels.DragonECS.Test
+{
+    public class TestWorld
+    {
+        public PoolToken RegisterPool<TComponent>()
+        {
+            return new PoolToken(1);
+        }
+    }
+
+    public readonly struct PoolToken
+    {
+        internal readonly ushort id;
+        public PoolToken(ushort id)
+        {
+            this.id = id;
+        }
+    }
+    //реализовать query так чтоб на вход он получал какуюто коллекцию и заполнял ее. по итогу на выходе запроса юзер будет иметь просто список
+    //таким образом во первых он сам может решить как его прокрутить, через for или foreach или еще как. во вторых можно будет прикрутить поддержку nativearray от unity
+
+    public class TestPool<TComponent>
+    {
+        private PoolToken _token;
+        public TestPool(TestWorld world)
+        {
+            _token = world.RegisterPool<TComponent>();
+        }
+    }
+}