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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,51 @@ | ||
| using BenchmarkDotNet.Attributes; | ||
| using System; | ||
| using System.Collections.Generic; | ||
| using System.Linq; | ||
| using System.Runtime.InteropServices; | ||
| using System.Text; | ||
| using System.Threading.Tasks; | ||
|
|
||
| namespace Faster.Map.Hash.Benchmark | ||
| { | ||
| public class Benchmark | ||
| { | ||
| private FastHash _hash = new FastHash(); | ||
| private string source; | ||
|
|
||
| [Params(10, 16, 32, 48, 100)] | ||
| public uint StringLength { get; set; } | ||
|
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| [Params(10, 100, 1000, 10000)] | ||
| public uint Iterations { get; set; } | ||
|
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||
| [GlobalSetup] | ||
| public void Setup() | ||
| { | ||
| FastHash.CreateSeed(); | ||
|
|
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| var data = Enumerable.Range(0, (int)StringLength).Select(i => (char)i).ToArray(); | ||
|
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| source = new string(data); | ||
| } | ||
|
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| [Benchmark] | ||
| public void RunFastHash() | ||
| { | ||
| for (int i = 0; i < Iterations; ++i) | ||
| { | ||
| FastHash.HashU64(MemoryMarshal.AsBytes(source.AsSpan())); | ||
| } | ||
| } | ||
|
|
||
| [Benchmark] | ||
| public void RunMarvinHash() | ||
| { | ||
| for (int i = 0; i < Iterations; ++i) | ||
| { | ||
| source.GetHashCode(); | ||
| } | ||
| } | ||
|
|
||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,20 @@ | ||
| <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" /> | ||
| <PackageReference Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.14.0" /> | ||
| <PackageReference Include="ObjectLayoutInspector" Version="0.1.4" /> | ||
| </ItemGroup> | ||
|
|
||
| <ItemGroup> | ||
| <ProjectReference Include="..\src\Faster.Map.csproj" /> | ||
| </ItemGroup> | ||
|
|
||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,5 @@ | ||
| using BenchmarkDotNet.Configs; | ||
| using BenchmarkDotNet.Running; | ||
| using Faster.Map.Hash.Benchmark; | ||
|
|
||
| BenchmarkRunner.Run<Benchmark>(new DebugInProcessConfig()); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,179 @@ | ||
| using System; | ||
| using System.Linq; | ||
| using System.Text; | ||
| using Xunit; | ||
|
|
||
| namespace Faster.Map.Hash; | ||
| public class FastHashLargeStringTests | ||
| { | ||
| private const int LargeSize = 10_000_000; // 10 million characters | ||
|
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||
|
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| [Fact] | ||
| public void HashU64_LargeString_AllSameCharacters() | ||
| { | ||
| // Arrange | ||
| string input = new string('A', LargeSize); | ||
| ReadOnlySpan<byte> bytes = Encoding.UTF8.GetBytes(input); | ||
|
|
||
| // Act | ||
| ulong hash = FastHash.HashU64(bytes); | ||
|
|
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| // Assert | ||
| Assert.NotEqual(0UL, hash); | ||
| } | ||
|
|
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| [Fact] | ||
| public void HashU64_LargeString_RepeatingPattern() | ||
| { | ||
| // Arrange | ||
| string pattern = "1234567890"; | ||
| int repeatCount = LargeSize / pattern.Length; | ||
| string input = string.Concat(Enumerable.Repeat(pattern, repeatCount)); | ||
| ReadOnlySpan<byte> bytes = Encoding.UTF8.GetBytes(input); | ||
|
|
||
| // Act | ||
| ulong hash = FastHash.HashU64(bytes); | ||
|
|
||
| // Assert | ||
| Assert.NotEqual(0UL, hash); | ||
| } | ||
|
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| [Fact] | ||
| public void HashU64_LargeString_RandomCharacters() | ||
| { | ||
| // Arrange | ||
| string input = GenerateRandomString(LargeSize); | ||
| ReadOnlySpan<byte> bytes = Encoding.UTF8.GetBytes(input); | ||
|
|
||
| // Act | ||
| ulong hash = FastHash.HashU64(bytes); | ||
|
|
||
| // Assert | ||
| Assert.NotEqual(0UL, hash); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void HashU64Secure_LargeString_AllSameCharacters() | ||
| { | ||
| // Arrange | ||
| string input = new string('Z', LargeSize); | ||
| ReadOnlySpan<byte> bytes = Encoding.UTF8.GetBytes(input); | ||
|
|
||
| // Act | ||
| ulong hash = FastHash.HashU64Secure(bytes); | ||
|
|
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| // Assert | ||
| Assert.NotEqual(0UL, hash); | ||
| } | ||
|
|
||
| [Fact] | ||
| public void HashU64Secure_LargeString_RepeatingPattern() | ||
| { | ||
| // Arrange | ||
| string pattern = "abcdefghij"; | ||
| int repeatCount = LargeSize / pattern.Length; | ||
| string input = string.Concat(Enumerable.Repeat(pattern, repeatCount)); | ||
| ReadOnlySpan<byte> bytes = Encoding.UTF8.GetBytes(input); | ||
|
|
||
| // Act | ||
| ulong hash = FastHash.HashU64Secure(bytes); | ||
|
|
||
| // Assert | ||
| Assert.NotEqual(0UL, hash); | ||
| } | ||
|
|
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| [Fact] | ||
| public void HashU64Secure_LargeString_RandomCharacters() | ||
| { | ||
| // Arrange | ||
| string input = GenerateRandomString(LargeSize); | ||
| ReadOnlySpan<byte> bytes = Encoding.UTF8.GetBytes(input); | ||
|
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| // Act | ||
| ulong hash = FastHash.HashU64Secure(bytes); | ||
|
|
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| // Assert | ||
| Assert.NotEqual(0UL, hash); | ||
| } | ||
|
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| [Fact] | ||
| public void HashU64_LargeString_DifferentStrings_GenerateDifferentHashes() | ||
| { | ||
| // Arrange | ||
| string input1 = new string('X', LargeSize); | ||
| string input2 = new string('Y', LargeSize); | ||
| ReadOnlySpan<byte> bytes1 = Encoding.UTF8.GetBytes(input1); | ||
| ReadOnlySpan<byte> bytes2 = Encoding.UTF8.GetBytes(input2); | ||
|
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| // Act | ||
| ulong hash1 = FastHash.HashU64(bytes1); | ||
| ulong hash2 = FastHash.HashU64(bytes2); | ||
|
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| // Assert | ||
| Assert.NotEqual(hash1, hash2); | ||
| } | ||
|
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| [Fact] | ||
| public void HashU64Secure_LargeString_DifferentStrings_GenerateDifferentHashes() | ||
| { | ||
| // Arrange | ||
| string input1 = GenerateRandomString(LargeSize); | ||
| string input2 = GenerateRandomString(LargeSize); | ||
| ReadOnlySpan<byte> bytes1 = Encoding.UTF8.GetBytes(input1); | ||
| ReadOnlySpan<byte> bytes2 = Encoding.UTF8.GetBytes(input2); | ||
|
|
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| // Act | ||
| ulong hash1 = FastHash.HashU64Secure(bytes1); | ||
| ulong hash2 = FastHash.HashU64Secure(bytes2); | ||
|
|
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| // Assert | ||
| Assert.NotEqual(hash1, hash2); | ||
| } | ||
|
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| [Fact] | ||
| public void HashU64_LargeString_SubstringHashesDiffer() | ||
| { | ||
| // Arrange | ||
| string input = GenerateRandomString(LargeSize); | ||
| ReadOnlySpan<byte> fullBytes = Encoding.UTF8.GetBytes(input); | ||
| ReadOnlySpan<byte> substringBytes = Encoding.UTF8.GetBytes(input.Substring(0, LargeSize / 2)); | ||
|
|
||
| // Act | ||
| ulong fullHash = FastHash.HashU64(fullBytes); | ||
| ulong substringHash = FastHash.HashU64(substringBytes); | ||
|
|
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| // Assert | ||
| Assert.NotEqual(fullHash, substringHash); | ||
| } | ||
|
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| [Fact] | ||
| public void HashU64Secure_LargeString_SubstringHashesDiffer() | ||
| { | ||
| // Arrange | ||
| string input = new string('A', LargeSize); | ||
| ReadOnlySpan<byte> fullBytes = Encoding.UTF8.GetBytes(input); | ||
| ReadOnlySpan<byte> substringBytes = Encoding.UTF8.GetBytes(input.Substring(0, LargeSize / 2)); | ||
|
|
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| // Act | ||
| ulong fullHash = FastHash.HashU64Secure(fullBytes); | ||
| ulong substringHash = FastHash.HashU64Secure(substringBytes); | ||
|
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| // Assert | ||
| Assert.NotEqual(fullHash, substringHash); | ||
| } | ||
|
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| private string GenerateRandomString(int length) | ||
| { | ||
| Random random = new Random(); | ||
| const string chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; | ||
| char[] result = new char[length]; | ||
|
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| for (int i = 0; i < length; i++) | ||
| { | ||
| result[i] = chars[random.Next(chars.Length)]; | ||
| } | ||
|
|
||
| return new string(result); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
|
||
| <PropertyGroup> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| <IsPackable>false</IsPackable> | ||
| </PropertyGroup> | ||
|
|
||
| <ItemGroup> | ||
| <PackageReference Include="coverlet.collector" Version="6.0.2" /> | ||
| <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" /> | ||
| <PackageReference Include="xunit" Version="2.9.0" /> | ||
| <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2" /> | ||
| </ItemGroup> | ||
|
|
||
| <ItemGroup> | ||
| <ProjectReference Include="..\src\Faster.Map.csproj" /> | ||
| </ItemGroup> | ||
|
|
||
| <ItemGroup> | ||
| <Using Include="Xunit" /> | ||
| </ItemGroup> | ||
|
|
||
| </Project> |
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