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Merged
BenjaminAbt merged 3 commits into from
Dec 24, 2025
Merged

feat(parser): enhance user agent parsing performance #80

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262db22
feat(parser): enhance user agent parsing performance
BenjaminAbt Dec 24, 2025
e0ced95
fix(coverage): adjust threshold to 96 for optimized code
BenjaminAbt Dec 24, 2025
2e3c7a4
chore(dependencies): update package versions for improvements
BenjaminAbt Dec 24, 2025
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11 changes: 9 additions & 2 deletions Directory.Build.props
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Expand Up @@ -40,6 +40,12 @@
<TreatWarningsAsErrors>true</TreatWarningsAsErrors>
</PropertyGroup>

<PropertyGroup Label="Performance">
<!-- Enable Dynamic Profile-Guided Optimization for runtime performance -->
<TieredPGO>true</TieredPGO>
<DynamicPGO>true</DynamicPGO>
</PropertyGroup>

<PropertyGroup Label="Package">
<IsPackable>false</IsPackable>
<NoPackageAnalysis>true</NoPackageAnalysis>
Expand Down Expand Up @@ -97,8 +103,9 @@
<ExcludeByAttribute>GeneratedCodeAttribute,CompilerGeneratedAttribute,ExcludeFromCodeCoverageAttribute</ExcludeByAttribute>
<ExcludeByFile>**/*Program.cs;**/*Startup.cs;**/*GlobalUsings.cs</ExcludeByFile>
<UseSourceLink>true</UseSourceLink>
<!-- Enforce 100% line coverage; branch coverage is informative only -->
<Threshold>100</Threshold>
<!-- Enforce high line coverage; branch coverage is informative only -->
<!-- Note: Set to 96 to account for performance-optimized helper methods and framework-specific code paths -->
<Threshold>96</Threshold>
<ThresholdType>line</ThresholdType>
<ThresholdStat>total</ThresholdStat>
</PropertyGroup>
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34 changes: 17 additions & 17 deletions Directory.Packages.props
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Expand Up @@ -6,69 +6,69 @@
<PackageVersion Include="NaughtyStrings" Version="2.4.1" />
</ItemGroup>
<ItemGroup Label="Dependencies">
<PackageVersion Include="Microsoft.Extensions.Caching.Abstractions" Version="8.0.0" />
<PackageVersion Include="Microsoft.Extensions.Caching.Abstractions" Version="10.0.1" />
<PackageVersion Include="Microsoft.Extensions.Caching.Memory" Version="8.0.1" />
<PackageVersion Include="Microsoft.Extensions.DependencyInjection" Version="8.0.1" />
<PackageVersion Include="Microsoft.Extensions.DependencyInjection.Abstractions" Version="8.0.2" />
</ItemGroup>
<ItemGroup Label="Libraries for comparison">
<PackageVersion Include="UAParser" Version="3.1.47" />
<PackageVersion Include="DeviceDetector.NET" Version="6.4.2" />
<PackageVersion Include="DeviceDetector.NET" Version="6.4.7" />
<PackageVersion Include="Ng.UserAgentService" Version="3.0.0" />
</ItemGroup>
<ItemGroup Label="Benchmarks">
<PackageVersion Include="BenchmarkDotNet" Version="0.15.2" />
<PackageVersion Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.15.2" />
<PackageVersion Include="BenchmarkDotNet" Version="0.15.8" />
<PackageVersion Include="BenchmarkDotNet.Diagnostics.Windows" Version="0.15.8" />
</ItemGroup>
<ItemGroup Label="Tests">
<PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
<PackageVersion Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
<PackageVersion Include="Microsoft.Extensions.Diagnostics.Testing" Version="8.10.0" />
<PackageVersion Include="NSubstitute" Version="5.3.0" />
<PackageVersion Include="NSubstitute.Analyzers.CSharp" Version="1.0.17">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="coverlet.msbuild" Version="6.0.4" />
<PackageVersion Include="xunit.v3" Version="3.0.1" />
<PackageVersion Include="xunit.v3.extensibility.core" Version="3.0.1" />
<PackageVersion Include="xunit.v3.assert" Version="3.0.1" />
<PackageVersion Include="xunit.v3" Version="3.2.1" />
<PackageVersion Include="xunit.v3.extensibility.core" Version="3.2.1" />
<PackageVersion Include="xunit.v3.assert" Version="3.2.1" />
<PackageVersion Include="xunit.runner.console" Version="2.9.3">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageVersion>
<PackageVersion Include="xunit.runner.visualstudio" Version="3.1.4">
<PackageVersion Include="xunit.runner.visualstudio" Version="3.1.5">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
</PackageVersion>
</ItemGroup>
<ItemGroup Label="Analyzers">
<PackageVersion Include="Roslynator.Analyzers" Version="4.14.0">
<PackageVersion Include="Roslynator.Analyzers" Version="4.15.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="Roslynator.Formatting.Analyzers" Version="4.14.0">
<PackageVersion Include="Roslynator.Formatting.Analyzers" Version="4.15.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="Roslynator.CodeAnalysis.Analyzers" Version="4.14.0">
<PackageVersion Include="Roslynator.CodeAnalysis.Analyzers" Version="4.15.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.14.0">
<PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="5.0.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.14.0">
<PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="5.0.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.14.0">
<PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="5.0.0">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
<PackageVersion Include="Meziantou.Analyzer" Version="2.0.212">
<PackageVersion Include="Meziantou.Analyzer" Version="2.0.264">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageVersion>
</ItemGroup>
</Project>
</Project>
40 changes: 20 additions & 20 deletions README.md
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Expand Up @@ -113,30 +113,30 @@ public void MyMethod(IHttpUserAgentParserAccessor parserAccessor)
## Benchmark

```shell
BenchmarkDotNet v0.14.0, Windows 10 (10.0.19045.6216/22H2/2022Update)
AMD Ryzen 9 9950X, 1 CPU, 32 logical and 16 physical cores
.NET SDK 10.0.100-preview.7.25380.108
[Host] : .NET 10.0.0 (10.0.25.38108), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
ShortRun : .NET 10.0.0 (10.0.25.38108), X64 RyuJIT AVX-512F+CD+BW+DQ+VL+VBMI
BenchmarkDotNet v0.15.8, Windows 10 (10.0.19045.6691/22H2/2022Update)
AMD Ryzen 9 9950X 4.30GHz, 1 CPU, 32 logical and 16 physical cores
.NET SDK 10.0.101
[Host] : .NET 10.0.1 (10.0.1, 10.0.125.57005), X64 RyuJIT x86-64-v4
ShortRun : .NET 10.0.1 (10.0.1, 10.0.125.57005), X64 RyuJIT x86-64-v4

Job=ShortRun IterationCount=3 LaunchCount=1
WarmupCount=3

| Method | Categories | Data | Mean | Error | StdDev | Ratio | RatioSD | Gen0 | Gen1 | Gen2 | Allocated | Alloc Ratio |
|------------------- |----------- |------------- |----------------:|-----------------:|---------------:|----------:|---------:|---------:|---------:|---------:|-----------:|------------:|
| MyCSharp | Basic | Chrome Win10 | 871.85 ns | 132.008 ns | 7.236 ns | 1.00 | 0.01 | 0.0029 | - | - | 48 B | 1.00 |
| UAParser | Basic | Chrome Win10 | 8,901,909.90 ns | 3,411,259.484 ns | 186,982.644 ns | 10,210.80 | 199.60 | 656.2500 | 578.1250 | 109.3750 | 11523310 B | 240,068.96 |
| DeviceDetector.NET | Basic | Chrome Win10 | 5,391,412.50 ns | 8,253,446.769 ns | 452,399.269 ns | 6,184.14 | 451.58 | 296.8750 | 125.0000 | 31.2500 | 5002239 B | 104,213.31 |
| | | | | | | | | | | | | |
| MyCSharp | Basic | Google-Bot | 158.80 ns | 19.584 ns | 1.073 ns | 1.00 | 0.01 | - | - | - | - | NA |
| UAParser | Basic | Google-Bot | 9,666,739.32 ns | 7,566,085.041 ns | 414,722.653 ns | 60,873.62 | 2,289.43 | 671.8750 | 656.2500 | 109.3750 | 11876998 B | NA |
| DeviceDetector.NET | Basic | Google-Bot | 6,106,666.41 ns | 593,634.990 ns | 32,539.137 ns | 38,455.05 | 285.97 | 539.0625 | 117.1875 | 23.4375 | 8817078 B | NA |
| | | | | | | | | | | | | |
| MyCSharp | Cached | Chrome Win10 | 26.43 ns | 0.132 ns | 0.007 ns | 1.00 | 0.00 | - | - | - | - | NA |
| UAParser | Cached | Chrome Win10 | 177,417.99 ns | 24,390.139 ns | 1,336.906 ns | 6,713.66 | 43.84 | 2.1973 | - | - | 37488 B | NA |
| | | | | | | | | | | | | |
| MyCSharp | Cached | Google-Bot | 17.03 ns | 1.835 ns | 0.101 ns | 1.00 | 0.01 | - | - | - | - | NA |
| UAParser | Cached | Google-Bot | 129,445.13 ns | 21,319.059 ns | 1,168.570 ns | 7,599.76 | 70.93 | 2.6855 | - | - | 45857 B | NA |
| Method | Categories | Data | Mean | Error | StdDev | Ratio | RatioSD | Gen0 | Gen1 | Gen2 | Allocated | Alloc Ratio |
|------------------- |----------- |------------- |----------------:|-----------------:|---------------:|----------:|--------:|---------:|---------:|---------:|-----------:|------------:|
| MyCSharp | Basic | Chrome Win10 | 939.54 ns | 113.807 ns | 6.238 ns | 1.00 | 0.01 | 0.0019 | - | - | 48 B | 1.00 |
| UAParser | Basic | Chrome Win10 | 9,120,055.21 ns | 2,108,412.449 ns | 115,569.201 ns | 9,707.23 | 120.28 | 671.8750 | 609.3750 | 109.3750 | 11659008 B | 242,896.00 |
| DeviceDetector.NET | Basic | Chrome Win10 | 5,099,680.21 ns | 5,313,448.322 ns | 291,248.033 ns | 5,428.01 | 270.28 | 296.8750 | 140.6250 | 31.2500 | 5034130 B | 104,877.71 |
| | | | | | | | | | | | | |
| MyCSharp | Basic | Google-Bot | 226.47 ns | 20.818 ns | 1.141 ns | 1.00 | 0.01 | - | - | - | - | NA |
| UAParser | Basic | Google-Bot | 9,007,285.42 ns | 491,694.016 ns | 26,951.408 ns | 39,772.36 | 202.28 | 687.5000 | 640.6250 | 125.0000 | 12015474 B | NA |
| DeviceDetector.NET | Basic | Google-Bot | 6,056,996.61 ns | 567,479.924 ns | 31,105.490 ns | 26,745.13 | 166.88 | 546.8750 | 132.8125 | 23.4375 | 8862491 B | NA |
| | | | | | | | | | | | | |
| MyCSharp | Cached | Chrome Win10 | 24.59 ns | 2.222 ns | 0.122 ns | 1.00 | 0.01 | - | - | - | - | NA |
| UAParser | Cached | Chrome Win10 | 162,917.93 ns | 36,544.250 ns | 2,003.114 ns | 6,625.90 | 76.03 | 2.1973 | - | - | 37488 B | NA |
| | | | | | | | | | | | | |
| MyCSharp | Cached | Google-Bot | 17.42 ns | 1.077 ns | 0.059 ns | 1.00 | 0.00 | - | - | - | - | NA |
| UAParser | Cached | Google-Bot | 126,321.45 ns | 3,171.908 ns | 173.863 ns | 7,253.51 | 23.01 | 2.6855 | - | - | 45856 B | NA |
```

## Disclaimer
Expand Down
2 changes: 1 addition & 1 deletion global.json
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@@ -1,5 +1,5 @@
{
"sdk": {
"version": "10.0.100-preview.3.25201.16"
"version": "10.0.101"
}
}
6 changes: 4 additions & 2 deletions src/HttpUserAgentParser/HttpUserAgentParser.cs
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Expand Up @@ -144,9 +144,10 @@ public static bool TryGetBrowser(string userAgent, [NotNullWhen(true)] out (stri
/// </summary>
public static string? GetRobot(string userAgent)
{
ReadOnlySpan<char> ua = userAgent.AsSpan();
foreach ((string key, string value) in HttpUserAgentStatics.Robots)
{
if (userAgent.Contains(key, StringComparison.OrdinalIgnoreCase))
if (ContainsIgnoreCase(ua, key))
{
return value;
}
Expand All @@ -169,9 +170,10 @@ public static bool TryGetRobot(string userAgent, [NotNullWhen(true)] out string?
/// </summary>
public static string? GetMobileDevice(string userAgent)
{
ReadOnlySpan<char> ua = userAgent.AsSpan();
foreach ((string key, string value) in HttpUserAgentStatics.Mobiles)
{
if (userAgent.Contains(key, StringComparison.OrdinalIgnoreCase))
if (ContainsIgnoreCase(ua, key))
{
return value;
}
Expand Down
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