diff --git a/src/Collections/EcsGroup.cs b/src/Collections/EcsGroup.cs
index 7334897..5d70cfe 100644
--- a/src/Collections/EcsGroup.cs
+++ b/src/Collections/EcsGroup.cs
@@ -400,7 +400,7 @@ namespace DCFApixels.DragonECS
         {
             if (++_count >= _dense.Length)
             {
-                Array.Resize(ref _dense, ArrayUtility.NormalizeSizeToPowerOfTwo(_count << 1));
+                Array.Resize(ref _dense, ArrayUtility.NextPow2(_count << 1));
             }
             _dense[_count] = entityID;
 
@@ -531,7 +531,7 @@ namespace DCFApixels.DragonECS
         {
             if (minSize >= _dense.Length)
             {
-                Array.Resize(ref _dense, ArrayUtility.NormalizeSizeToPowerOfTwo_ClampOverflow(minSize));
+                Array.Resize(ref _dense, ArrayUtility.NextPow2_ClampOverflow(minSize));
             }
         }
 
@@ -618,7 +618,7 @@ namespace DCFApixels.DragonECS
         {
             if (dynamicBuffer.Length < _count)
             {
-                Array.Resize(ref dynamicBuffer, ArrayUtility.NormalizeSizeToPowerOfTwo(_count));
+                Array.Resize(ref dynamicBuffer, ArrayUtility.NextPow2(_count));
             }
             int i = 0;
             foreach (var e in this)
diff --git a/src/Collections/EcsSpan.cs b/src/Collections/EcsSpan.cs
index 58bc198..48c26c4 100644
--- a/src/Collections/EcsSpan.cs
+++ b/src/Collections/EcsSpan.cs
@@ -97,7 +97,7 @@ namespace DCFApixels.DragonECS
         {
             if (dynamicBuffer.Length < _values.Length)
             {
-                Array.Resize(ref dynamicBuffer, ArrayUtility.NormalizeSizeToPowerOfTwo(_values.Length));
+                Array.Resize(ref dynamicBuffer, ArrayUtility.NextPow2(_values.Length));
             }
             int i = 0;
             foreach (var e in this)
@@ -246,7 +246,7 @@ namespace DCFApixels.DragonECS
         {
             if (dynamicBuffer.Length < _source.Count)
             {
-                Array.Resize(ref dynamicBuffer, ArrayUtility.NormalizeSizeToPowerOfTwo(_source.Count));
+                Array.Resize(ref dynamicBuffer, ArrayUtility.NextPow2(_source.Count));
             }
             int i = 0;
             foreach (var e in this)
diff --git a/src/EcsWorld.cs b/src/EcsWorld.cs
index e4d6ff9..25015ad 100644
--- a/src/EcsWorld.cs
+++ b/src/EcsWorld.cs
@@ -198,12 +198,12 @@ namespace DCFApixels.DragonECS
 
                 _poolsMediator = new PoolsMediator(this);
 
-                int poolsCapacity = ArrayUtility.NormalizeSizeToPowerOfTwo(config.PoolsCapacity);
+                int poolsCapacity = ArrayUtility.NextPow2(config.PoolsCapacity);
                 _pools = new IEcsPoolImplementation[poolsCapacity];
                 _poolSlots = new PoolSlot[poolsCapacity];
                 ArrayUtility.Fill(_pools, _nullPool);
 
-                int entitiesCapacity = ArrayUtility.NormalizeSizeToPowerOfTwo(config.EntitiesCapacity);
+                int entitiesCapacity = ArrayUtility.NextPow2(config.EntitiesCapacity);
                 _entityDispenser = new IdDispenser(entitiesCapacity, 0, OnEntityDispenserResized);
 
                 _executorCoures = new Dictionary<(Type, object), IQueryExecutorImplementation>(config.PoolComponentsCapacity);
diff --git a/src/Internal/ArrayUtility.cs b/src/Internal/ArrayUtility.cs
index 4927430..33dc2a0 100644
--- a/src/Internal/ArrayUtility.cs
+++ b/src/Internal/ArrayUtility.cs
@@ -92,58 +92,33 @@ namespace DCFApixels.DragonECS.Internal
             Array.Copy(array, array.Length - rightHeadLength, result, array.Length - rightHeadLength, rightHeadLength); // copy right head
             array = result;
         }
-        private static int GetHighBitNumber(uint bits)
-        {
-            if (bits == 0)
-            {
-                return -1;
-            }
-            int bit = 0;
-            if ((bits & 0xFFFF0000) != 0)
-            {
-                bits >>= 16;
-                bit |= 16;
-            }
-            if ((bits & 0xFF00) != 0)
-            {
-                bits >>= 8;
-                bit |= 8;
-            }
-            if ((bits & 0xF0) != 0)
-            {
-                bits >>= 4;
-                bit |= 4;
-            }
-            if ((bits & 0xC) != 0)
-            {
-                bits >>= 2;
-                bit |= 2;
-            }
-            if ((bits & 0x2) != 0)
-            {
-                bit |= 1;
-            }
-            return bit;
-        }
-        public static int NormalizeSizeToPowerOfTwo(int minSize)
+
+        public static int NextPow2(int v)
         {
             unchecked
             {
-                return 1 << (GetHighBitNumber((uint)minSize - 1u) + 1);
+                v--;
+                v |= v >> 1;
+                v |= v >> 2;
+                v |= v >> 4;
+                v |= v >> 8;
+                v |= v >> 16;
+                return ++v;
             }
         }
-        public static int NormalizeSizeToPowerOfTwo_ClampOverflow(int minSize)
+        public static int NextPow2_ClampOverflow(int v)
         {
             unchecked
             {
-                int hibit = (GetHighBitNumber((uint)minSize - 1u) + 1);
-                if (hibit >= 32)
+                const int NO_SIGN_HIBIT = 0x40000000;
+                if ((v & NO_SIGN_HIBIT) != 0)
                 {
                     return int.MaxValue;
                 }
-                return 1 << hibit;
+                return NextPow2(v);
             }
         }
+
         public static void Fill<T>(T[] array, T value, int startIndex = 0, int length = -1)
         {
             if (length < 0)
diff --git a/src/Internal/IdDispenser.cs b/src/Internal/IdDispenser.cs
index 3ac1a83..1d4aa21 100644
--- a/src/Internal/IdDispenser.cs
+++ b/src/Internal/IdDispenser.cs
@@ -247,7 +247,7 @@ namespace DCFApixels.DragonECS.Internal
         [MethodImpl(MethodImplOptions.NoInlining)]
         private void Upsize_Internal(int minSize)
         {
-            Resize(ArrayUtility.NormalizeSizeToPowerOfTwo_ClampOverflow(minSize));
+            Resize(ArrayUtility.NextPow2_ClampOverflow(minSize));
         }
         private void Resize(int newSize)
         {
diff --git a/src/Internal/StructList.cs b/src/Internal/StructList.cs
index d7ad9aa..7488304 100644
--- a/src/Internal/StructList.cs
+++ b/src/Internal/StructList.cs
@@ -26,7 +26,7 @@ namespace DCFApixels.DragonECS.Internal
             set
             {
                 if (value <= _items.Length) { return; }
-                value = ArrayUtility.NormalizeSizeToPowerOfTwo(value);
+                value = ArrayUtility.NextPow2(value);
                 Array.Resize(ref _items, value);
             }
         }
@@ -53,7 +53,7 @@ namespace DCFApixels.DragonECS.Internal
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public StructList(int capacity)
         {
-            _items = new T[ArrayUtility.NormalizeSizeToPowerOfTwo(capacity)];
+            _items = new T[ArrayUtility.NextPow2(capacity)];
             _count = 0;
         }
 
diff --git a/src/Pools/EcsPool.cs b/src/Pools/EcsPool.cs
index cb4bb09..e7a1218 100644
--- a/src/Pools/EcsPool.cs
+++ b/src/Pools/EcsPool.cs
@@ -266,7 +266,7 @@ namespace DCFApixels.DragonECS
             _maskBit = EcsMaskChunck.FromID(componentTypeID);
 
             _mapping = new int[world.Capacity];
-            _items = new T[ArrayUtility.NormalizeSizeToPowerOfTwo(world.Configs.GetWorldConfigOrDefault().PoolComponentsCapacity)];
+            _items = new T[ArrayUtility.NextPow2(world.Configs.GetWorldConfigOrDefault().PoolComponentsCapacity)];
             _recycledItems = new int[world.Configs.GetWorldConfigOrDefault().PoolRecycledComponentsCapacity];
         }
         void IEcsPoolImplementation.OnWorldResize(int newSize)