MemoryをNativeArrayにコピーするときポインターを介することでコピーを削減

Packages/UniGLTF/Runtime/UniGLTF.asmdef

@@ -9,7 +9,7 @@
     ],
     "includePlatforms": [],
     "excludePlatforms": [],
-    "allowUnsafeCode": false,
+    "allowUnsafeCode": true,
     "overrideReferences": false,
     "precompiledReferences": [],
     "autoReferenced": true,

Packages/UniGLTF/Runtime/UniGLTF/IO/NativeArrayManager.cs

@@ -3,6 +3,7 @@ using System.Linq;
 using System.Collections.Generic;
 using Unity.Collections;
 using System.Runtime.InteropServices;
+using Unity.Collections.LowLevel.Unsafe;
 
 namespace UniGLTF
 {
@@ -89,11 +90,17 @@ namespace UniGLTF
 
         public NativeArray<T> CreateNativeArray<T>(ReadOnlyMemory<T> data) where T : struct
         {
-            var array = CreateNativeArray<T>(data.Length);
-            var toSpan = array.AsSpan();
-            var fromSpan = data.Span;
-            fromSpan.CopyTo(toSpan);
-            return array;
+            unsafe
+            {
+                var handle = data.Pin();
+                var nativeArray = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray<T>(handle.Pointer, data.Length, Allocator.Persistent);
+                m_disposables.Add(nativeArray);
+                m_disposables.Add(handle);
+#if ENABLE_UNITY_COLLECTIONS_CHECKS
+                NativeArrayUnsafeUtility.SetAtomicSafetyHandle(ref nativeArray, AtomicSafetyHandle.Create());
+#endif
+              return nativeArray;
+            }
         }
 
         /// <summary>