diff --git a/Assets/Scripts/Framework/DDT.cs b/Assets/Scripts/Framework/DDT.cs
index 1ce13fd..0ca99eb 100644
--- a/Assets/Scripts/Framework/DDT.cs
+++ b/Assets/Scripts/Framework/DDT.cs
@@ -3,10 +3,12 @@ using System.Collections.Generic;
 using Convention;
 using UnityEngine;
 using System;
+using Unity.Collections;
+using UnityEngine.Rendering;
 
 namespace Demo.Game
 {
-    public class DDT : ScriptableObject, IEnumerable<float>
+    public class DDT : ScriptableObject
     {
         protected override bool IsSelfEnableUpdate => false;
         public static DDT Make()
@@ -14,27 +16,31 @@ namespace Demo.Game
             return new GameObject().AddComponent<DDT>();
         }
 
-        public List<float> Datas = new();
+        public NativeArray<float> Datas = new(128, Allocator.Persistent, NativeArrayOptions.UninitializedMemory);
+        public int Count { get; private set; } = 0;
 
         [Convention.RScript.Variable.Attr.Method]
         public void Add(float value)
         {
-            Datas.Add(value);
+            if (Count >= Datas.Length)
+                Datas.ResizeArray(Mathf.FloorToInt(Count * 1.5f));
+            Datas[Count] = value;
+            Count++;
         }
 
         [Convention.RScript.Variable.Attr.Method]
         public void Add(int barSplitTimes, int barCount, int tickCount)
         {
-            Datas.Add((barCount + tickCount / (float)barSplitTimes) * OneBarTime);
+            Add((barCount + tickCount / (float)barSplitTimes) * OneBarTime);
         }
 
         [Convention.RScript.Variable.Attr.Method]
         public float At(int index)
         {
             if (index < 0)
-                index = Datas.Count + index;
-            if (index < 0 || index >= Datas.Count)
-                throw new IndexOutOfRangeException($"{index} is out of [0, {Datas.Count})");
+                index = Count + index;
+            if (index < 0 || index >= Count)
+                throw new IndexOutOfRangeException($"{index} is out of [0, {Count})");
             return Datas[index];
         }
 
@@ -45,19 +51,7 @@ namespace Demo.Game
         [Convention.RScript.Variable.Attr.Method]
         public int GetCount()
         {
-            return Datas.Count;
+            return Count;
         }
-
-        public IEnumerator<float> GetEnumerator()
-        {
-            return ((IEnumerable<float>)Datas).GetEnumerator();
-        }
-
-        IEnumerator IEnumerable.GetEnumerator()
-        {
-            return ((IEnumerable)Datas).GetEnumerator();
-        }
-
-        public int Count => Datas.Count;    
     }
 }
diff --git a/Assets/Scripts/Framework/Updatement.cs b/Assets/Scripts/Framework/Updatement.cs
index 9faac30..24e30ba 100644
--- a/Assets/Scripts/Framework/Updatement.cs
+++ b/Assets/Scripts/Framework/Updatement.cs
@@ -63,9 +63,9 @@ namespace Demo.Game
         {
             Entries.Sort((x, y) => x.TimePoint.CompareTo(y.TimePoint));
             CompiledEntries = new(
-                new NativeArray<float>(Entries.Count, Allocator.Persistent),
-                new NativeArray<DataType>(Entries.Count, Allocator.Persistent),
-                new NativeArray<MathExtension.EaseCurveType>(Entries.Count, Allocator.Persistent),
+                new NativeArray<float>(Entries.Count, Allocator.Persistent, NativeArrayOptions.UninitializedMemory),
+                new NativeArray<DataType>(Entries.Count, Allocator.Persistent, NativeArrayOptions.UninitializedMemory),
+                new NativeArray<MathExtension.EaseCurveType>(Entries.Count, Allocator.Persistent, NativeArrayOptions.UninitializedMemory),
                 Entries.Count
             );
             int index = 0;