[Optimization] - Optimize key method

Neo.Cryptography.MPTTrie.Benchmarks/Benchmarks.Cache.cs

@@ -0,0 +1,52 @@
+// Copyright (C) 2015-2025 The Neo Project.
+//
+// Benchmarks.Cache.cs file belongs to the neo project and is free
+// software distributed under the MIT software license, see the
+// accompanying file LICENSE in the main directory of the
+// repository or http://www.opensource.org/licenses/mit-license.php
+// for more details.
+//
+// Redistribution and use in source and binary forms with or without
+// modifications are permitted.
+
+using BenchmarkDotNet.Attributes;
+using System;
+using System.Security.Policy;
+
+namespace Neo.Cryptography.MPTTrie.Benchmarks
+{
+    public class Benchmarks_Cache
+    {
+        private readonly byte _prefix = 0x01;
+        private readonly UInt256 _hash;
+
+        public Benchmarks_Cache()
+        {
+            var randomBytes = new byte[UInt256.Length];
+            new Random(42).NextBytes(randomBytes);
+            _hash = new UInt256(randomBytes);
+        }
+
+        [Benchmark]
+        public byte[] Key_Original()
+        {
+            var buffer = new byte[UInt256.Length + 1];
+            using (var ms = new MemoryStream(buffer, true))
+            using (var writer = new BinaryWriter(ms))
+            {
+                writer.Write(_prefix);
+                _hash.Serialize(writer);
+            }
+            return buffer;
+        }
+
+        [Benchmark]
+        public byte[] Key_Optimized()
+        {
+            var buffer = new byte[UInt256.Length + 1];
+            buffer[0] = _prefix;
+            _hash.GetSpan().CopyTo(buffer.AsSpan(1));
+            return buffer;
+        }
+    }
+}

Neo.Cryptography.MPTTrie.Benchmarks/Neo.Cryptography.MPTTrie.Benchmarks.csproj

@@ -0,0 +1,18 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="BenchmarkDotNet" Version="0.14.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\src\Neo\Neo.csproj" />
+  </ItemGroup>
+
+</Project>

Neo.Cryptography.MPTTrie.Benchmarks/Program.cs

@@ -0,0 +1,23 @@
+// Copyright (C) 2015-2025 The Neo Project.
+//
+// Program.cs file belongs to the neo project and is free
+// software distributed under the MIT software license, see the
+// accompanying file LICENSE in the main directory of the
+// repository or http://www.opensource.org/licenses/mit-license.php
+// for more details.
+//
+// Redistribution and use in source and binary forms with or without
+// modifications are permitted.
+
+using BenchmarkDotNet.Running;
+
+// List all benchmarks:
+//  dotnet run -c Release --framework [for example: net9.0] -- --list flat(or tree)
+// Run a specific benchmark:
+//  dotnet run -c Release --framework [for example: net9.0] -- -f [benchmark name]
+// Run all benchmarks:
+//  dotnet run -c Release --framework [for example: net9.0] -- -f *
+// Run all benchmarks of a class:
+//  dotnet run -c Release --framework [for example: net9.0] -- -f '*Class*'
+// More options: https://benchmarkdotnet.org/articles/guides/console-args.html
+BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);

neo.sln

@@ -93,6 +93,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SignClient", "src\Plugins\S
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Neo.Plugins.SignClient.Tests", "tests\Neo.Plugins.SignClient.Tests\Neo.Plugins.SignClient.Tests.csproj", "{E2CFEAA1-45F2-4075-94ED-866862C6863F}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Neo.Cryptography.MPTTrie.Benchmarks", "Neo.Cryptography.MPTTrie.Benchmarks\Neo.Cryptography.MPTTrie.Benchmarks.csproj", "{A53FE0B5-22BA-4C52-8FD4-80877DB62992}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -259,6 +261,10 @@ Global
 		{E2CFEAA1-45F2-4075-94ED-866862C6863F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{E2CFEAA1-45F2-4075-94ED-866862C6863F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{E2CFEAA1-45F2-4075-94ED-866862C6863F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A53FE0B5-22BA-4C52-8FD4-80877DB62992}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A53FE0B5-22BA-4C52-8FD4-80877DB62992}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A53FE0B5-22BA-4C52-8FD4-80877DB62992}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A53FE0B5-22BA-4C52-8FD4-80877DB62992}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -305,6 +311,7 @@ Global
 		{19B1CF1A-17F4-4E04-AB9C-55CE74952E11} = {EDE05FA8-8E73-4924-BC63-DD117127EEE1}
 		{CAD55942-48A3-4526-979D-7519FADF19FE} = {C2DC830A-327A-42A7-807D-295216D30DBB}
 		{E2CFEAA1-45F2-4075-94ED-866862C6863F} = {7F257712-D033-47FF-B439-9D4320D06599}
+		{A53FE0B5-22BA-4C52-8FD4-80877DB62992} = {C25EB0B0-0CAC-4CC1-8F36-F9229EFB99EC}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {BCBA19D9-F868-4C6D-8061-A2B91E06E3EC}

src/Neo.Cryptography.MPTTrie/Cache.cs

@@ -11,8 +11,10 @@
 
 using Neo.Extensions;
 using Neo.Persistence;
+using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Security.Policy;
 
 namespace Neo.Cryptography.MPTTrie
 {
@@ -45,12 +47,8 @@ public Cache(IStoreSnapshot store, byte prefix)
         private byte[] Key(UInt256 hash)
         {
             var buffer = new byte[UInt256.Length + 1];
-            using (var ms = new MemoryStream(buffer, true))
-            using (var writer = new BinaryWriter(ms))
-            {
-                writer.Write(_prefix);
-                hash.Serialize(writer);
-            }
+            buffer[0] = _prefix;
+            hash.GetSpan().CopyTo(buffer.AsSpan(1));
             return buffer;
         }