initial commit
This commit is contained in:
parent
924d32929b
commit
3c3b9dd7ed
13
.idea/.idea.Benchmark/.idea/.gitignore
generated
vendored
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13
.idea/.idea.Benchmark/.idea/.gitignore
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vendored
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@ -0,0 +1,13 @@
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|||||||
|
# Default ignored files
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||||||
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/shelf/
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/workspace.xml
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# Rider ignored files
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|
/.idea.Benchmark.iml
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/projectSettingsUpdater.xml
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/modules.xml
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/contentModel.xml
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# Datasource local storage ignored files
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/dataSources/
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/dataSources.local.xml
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# Editor-based HTTP Client requests
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/httpRequests/
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||||||
4
.idea/.idea.Benchmark/.idea/encodings.xml
generated
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4
.idea/.idea.Benchmark/.idea/encodings.xml
generated
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|
<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="Encoding" addBOMForNewFiles="with BOM under Windows, with no BOM otherwise" />
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</project>
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8
.idea/.idea.Benchmark/.idea/indexLayout.xml
generated
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8
.idea/.idea.Benchmark/.idea/indexLayout.xml
generated
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="ContentModelUserStore">
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<attachedFolders />
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<explicitIncludes />
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<explicitExcludes />
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</component>
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</project>
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6
.idea/.idea.Benchmark/.idea/misc.xml
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6
.idea/.idea.Benchmark/.idea/misc.xml
generated
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="JavaScriptSettings">
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<option name="languageLevel" value="ES6" />
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</component>
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</project>
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19
.idea/.idea.Benchmark/riderModule.iml
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19
.idea/.idea.Benchmark/riderModule.iml
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<?xml version="1.0" encoding="UTF-8"?>
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<module type="RIDER_MODULE" version="4">
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<component name="NewModuleRootManager">
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.diagnostics.tracing.traceevent/2.0.49/lib/native/amd64" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.diagnostics.tracing.traceevent/2.0.49/lib/native/x86" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.diagnostics.tracing.traceevent/2.0.49/lib/netstandard1.6/Dia2Lib.dll" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.diagnostics.tracing.traceevent/2.0.49/lib/netstandard1.6/OSExtensions.dll" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.diagnostics.tracing.traceevent/2.0.49/lib/netstandard1.6/TraceReloggerLib.dll" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.net.test.sdk/16.4.0/build/netcoreapp2.1" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.testplatform.testhost/16.4.0/build/netcoreapp2.1/x64/testhost.dll" />
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<content url="file://$USER_HOME$/.nuget/packages/microsoft.testplatform.testhost/16.4.0/build/netcoreapp2.1/x64/testhost.exe" />
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<content url="file://$USER_HOME$/.nuget/packages/nunit3testadapter/3.15.1/build/netcoreapp2.0/NUnit3.TestAdapter.dll" />
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<content url="file://$USER_HOME$/.nuget/packages/nunit3testadapter/3.15.1/build/netcoreapp2.0/NUnit3.TestAdapter.pdb" />
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<content url="file://$USER_HOME$/.nuget/packages/nunit3testadapter/3.15.1/build/netcoreapp2.0/nunit.engine.api.dll" />
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<content url="file://$USER_HOME$/.nuget/packages/nunit3testadapter/3.15.1/build/netcoreapp2.0/nunit.engine.dll" />
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<content url="file://$MODULE_DIR$/../.." />
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<orderEntry type="sourceFolder" forTests="false" />
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</component>
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</module>
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27
.vscode/launch.json
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27
.vscode/launch.json
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{
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// Use IntelliSense to find out which attributes exist for C# debugging
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// Use hover for the description of the existing attributes
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// For further information visit https://github.com/OmniSharp/omnisharp-vscode/blob/master/debugger-launchjson.md
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"version": "0.2.0",
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"configurations": [
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{
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"name": ".NET Core Launch (console)",
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"type": "coreclr",
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"request": "launch",
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"preLaunchTask": "build",
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// If you have changed target frameworks, make sure to update the program path.
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"program": "${workspaceFolder}/bin/Debug/netcoreapp3.1/Benchmark.dll",
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"args": [],
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"cwd": "${workspaceFolder}",
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// For more information about the 'console' field, see https://aka.ms/VSCode-CS-LaunchJson-Console
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"console": "internalConsole",
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"stopAtEntry": false
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},
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{
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"name": ".NET Core Attach",
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"type": "coreclr",
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"request": "attach",
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"processId": "${command:pickProcess}"
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}
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]
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}
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42
.vscode/tasks.json
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42
.vscode/tasks.json
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{
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"version": "2.0.0",
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"tasks": [
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{
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"label": "build",
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"command": "dotnet",
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"type": "process",
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"args": [
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"build",
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"${workspaceFolder}/Benchmark.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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},
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{
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"label": "publish",
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"command": "dotnet",
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"type": "process",
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"args": [
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"publish",
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"${workspaceFolder}/Benchmark.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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},
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{
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"label": "watch",
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"command": "dotnet",
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"type": "process",
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"args": [
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"watch",
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"run",
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"${workspaceFolder}/Benchmark.csproj",
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"/property:GenerateFullPaths=true",
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"/consoleloggerparameters:NoSummary"
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],
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"problemMatcher": "$msCompile"
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}
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]
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}
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24
Benchmark.csproj
Normal file
24
Benchmark.csproj
Normal file
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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>netcoreapp3.1</TargetFramework>
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</PropertyGroup>
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<ItemGroup>
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<PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
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</ItemGroup>
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<ItemGroup>
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<Compile Remove="TestProject1\**" />
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</ItemGroup>
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<ItemGroup>
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<EmbeddedResource Remove="TestProject1\**" />
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</ItemGroup>
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<ItemGroup>
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<None Remove="TestProject1\**" />
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</ItemGroup>
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</Project>
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48
Benchmark.sln
Normal file
48
Benchmark.sln
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Microsoft Visual Studio Solution File, Format Version 12.00
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||||||
|
# Visual Studio 15
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||||||
|
VisualStudioVersion = 15.0.26124.0
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||||||
|
MinimumVisualStudioVersion = 15.0.26124.0
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|
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Benchmark", "Benchmark.csproj", "{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}"
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|
EndProject
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||||||
|
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "TestProject1", "TestProject1\TestProject1.csproj", "{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}"
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|
EndProject
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||||||
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
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Debug|Any CPU = Debug|Any CPU
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Debug|x64 = Debug|x64
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Debug|x86 = Debug|x86
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Release|Any CPU = Release|Any CPU
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Release|x64 = Release|x64
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Release|x86 = Release|x86
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EndGlobalSection
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||||||
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE
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EndGlobalSection
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||||||
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GlobalSection(ProjectConfigurationPlatforms) = postSolution
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Debug|x64.ActiveCfg = Debug|Any CPU
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{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Debug|x64.Build.0 = Debug|Any CPU
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||||||
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{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Debug|x86.ActiveCfg = Debug|Any CPU
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||||||
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{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Debug|x86.Build.0 = Debug|Any CPU
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Release|Any CPU.ActiveCfg = Release|Any CPU
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Release|Any CPU.Build.0 = Release|Any CPU
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Release|x64.ActiveCfg = Release|Any CPU
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Release|x64.Build.0 = Release|Any CPU
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Release|x86.ActiveCfg = Release|Any CPU
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||||||
|
{994B1E75-4E3A-4A11-8363-FFB5FC759A5B}.Release|x86.Build.0 = Release|Any CPU
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||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Debug|Any CPU.Build.0 = Debug|Any CPU
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||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Debug|x64.ActiveCfg = Debug|Any CPU
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||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Debug|x64.Build.0 = Debug|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Debug|x86.ActiveCfg = Debug|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Debug|x86.Build.0 = Debug|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Release|Any CPU.ActiveCfg = Release|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Release|Any CPU.Build.0 = Release|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Release|x64.ActiveCfg = Release|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Release|x64.Build.0 = Release|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Release|x86.ActiveCfg = Release|Any CPU
|
||||||
|
{C6BD6A51-7394-4CDD-962C-2C39AC2D846C}.Release|x86.Build.0 = Release|Any CPU
|
||||||
|
EndGlobalSection
|
||||||
|
EndGlobal
|
||||||
67
Identity.cs
Normal file
67
Identity.cs
Normal file
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|
|||||||
|
using System.Linq;
|
||||||
|
using System.Runtime.CompilerServices;
|
||||||
|
|
||||||
|
namespace Benchmark
|
||||||
|
{
|
||||||
|
public readonly struct Identity
|
||||||
|
{
|
||||||
|
public Identity(string prefix, int index, int revision)
|
||||||
|
{
|
||||||
|
Prefix = prefix;
|
||||||
|
Index = index;
|
||||||
|
Revision = revision;
|
||||||
|
}
|
||||||
|
|
||||||
|
public string Prefix { get; }
|
||||||
|
public int Index { get; }
|
||||||
|
public int Revision { get; }
|
||||||
|
|
||||||
|
public static bool TryParse(string value, out Identity identity)
|
||||||
|
{
|
||||||
|
identity = default;
|
||||||
|
var position = value.Length;
|
||||||
|
if (!TryGetNumber(value, null, ref position, out var revision)) return false;
|
||||||
|
if (value[position] != '-') return false;
|
||||||
|
if (!TryGetNumber(value, 7, ref position, out var index)) return false;
|
||||||
|
if (!TryGetPrefix(value, ref position, out var prefix)) return false;
|
||||||
|
identity = new Identity(prefix, index, revision);
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
private static bool TryGetPrefix(in string identity, ref int lastPosition, out string prefix)
|
||||||
|
{
|
||||||
|
prefix = identity.Remove(lastPosition + 1);
|
||||||
|
if (prefix.Length <= 3) return false;
|
||||||
|
return !prefix.Any(character => character < 'A' || character > 'Z');
|
||||||
|
}
|
||||||
|
|
||||||
|
private static bool TryGetNumber(in string identity, int? exactLength, ref int currentPosition, out int revision)
|
||||||
|
{
|
||||||
|
revision = 0;
|
||||||
|
var start = currentPosition;
|
||||||
|
for (currentPosition = start - 1; currentPosition >= 0; currentPosition--)
|
||||||
|
{
|
||||||
|
var current = identity[currentPosition];
|
||||||
|
if(current == '0') continue;
|
||||||
|
if (current < '1' || current > '9') break;
|
||||||
|
revision += (current - '0') * IntegerPow(10, start - currentPosition - 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
if (exactLength != null && start - (currentPosition + 1) != exactLength) return false;
|
||||||
|
return revision != default;
|
||||||
|
}
|
||||||
|
|
||||||
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
||||||
|
private static int IntegerPow(int x, int y)
|
||||||
|
{
|
||||||
|
if (y == 0) return 1;
|
||||||
|
var result = x;
|
||||||
|
for (var i = 1; i < y; i++)
|
||||||
|
{
|
||||||
|
result *= x;
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
30
IdentityParser.cs
Normal file
30
IdentityParser.cs
Normal file
@ -0,0 +1,30 @@
|
|||||||
|
using System;
|
||||||
|
using System.Text.RegularExpressions;
|
||||||
|
using BenchmarkDotNet.Attributes;
|
||||||
|
|
||||||
|
namespace Benchmark
|
||||||
|
{
|
||||||
|
[MemoryDiagnoser]
|
||||||
|
public class IdentityParser
|
||||||
|
{
|
||||||
|
private const string TestIdentity = "ABZ0000001-1";
|
||||||
|
private readonly Regex _regex = new Regex(@"^(\w{3,})(\d{7})-(\d+)$", RegexOptions.Compiled);
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public Identity? Parse1()
|
||||||
|
{
|
||||||
|
var match = _regex.Match(TestIdentity);
|
||||||
|
if (!match.Success) return default;
|
||||||
|
var prefix = match.Groups[1].Value;
|
||||||
|
var index = int.Parse(match.Groups[2].Value);
|
||||||
|
var revision = int.Parse(match.Groups[2].Value);
|
||||||
|
return new Identity(prefix, index, revision);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public Identity? Parse2()
|
||||||
|
{
|
||||||
|
return Identity.TryParse(TestIdentity, out var identity) ? identity : default(Identity?);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
13
Program.cs
Normal file
13
Program.cs
Normal file
@ -0,0 +1,13 @@
|
|||||||
|
using BenchmarkDotNet.Running;
|
||||||
|
|
||||||
|
namespace Benchmark
|
||||||
|
{
|
||||||
|
public class Program
|
||||||
|
{
|
||||||
|
public static void Main(string[] args)
|
||||||
|
{
|
||||||
|
//var summary = BenchmarkRunner.Run<TrailingNumberFromString>();
|
||||||
|
var summary = BenchmarkRunner.Run<IdentityParser>();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
19
TestProject1/TestProject1.csproj
Normal file
19
TestProject1/TestProject1.csproj
Normal file
@ -0,0 +1,19 @@
|
|||||||
|
<Project Sdk="Microsoft.NET.Sdk">
|
||||||
|
|
||||||
|
<PropertyGroup>
|
||||||
|
<TargetFramework>netcoreapp3.1</TargetFramework>
|
||||||
|
|
||||||
|
<IsPackable>false</IsPackable>
|
||||||
|
</PropertyGroup>
|
||||||
|
|
||||||
|
<ItemGroup>
|
||||||
|
<PackageReference Include="nunit" Version="3.12.0" />
|
||||||
|
<PackageReference Include="NUnit3TestAdapter" Version="3.15.1" />
|
||||||
|
<PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.4.0" />
|
||||||
|
</ItemGroup>
|
||||||
|
|
||||||
|
<ItemGroup>
|
||||||
|
<ProjectReference Include="..\Benchmark.csproj" />
|
||||||
|
</ItemGroup>
|
||||||
|
|
||||||
|
</Project>
|
||||||
82
TestProject1/UnitTest1.cs
Normal file
82
TestProject1/UnitTest1.cs
Normal file
@ -0,0 +1,82 @@
|
|||||||
|
using Benchmark;
|
||||||
|
using NUnit.Framework;
|
||||||
|
|
||||||
|
namespace TestProject1
|
||||||
|
{
|
||||||
|
public class Tests
|
||||||
|
{
|
||||||
|
[SetUp]
|
||||||
|
public void Setup()
|
||||||
|
{
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test3()
|
||||||
|
{
|
||||||
|
var actual = new TrailingNumberFromString().GetTrailingNumberFromString3();
|
||||||
|
Assert.AreEqual(1234, actual);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test4()
|
||||||
|
{
|
||||||
|
var actual = new TrailingNumberFromString().GetTrailingNumberFromString4();
|
||||||
|
Assert.AreEqual(1234, actual);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test5()
|
||||||
|
{
|
||||||
|
var actual = new TrailingNumberFromString().GetTrailingNumberFromString5();
|
||||||
|
Assert.AreEqual(1234, actual);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test6()
|
||||||
|
{
|
||||||
|
var actual = new IdentityParser().Parse1();
|
||||||
|
Assert.AreEqual("ABZ", actual?.Prefix);
|
||||||
|
Assert.AreEqual(1, actual?.Index);
|
||||||
|
Assert.AreEqual(1, actual?.Revision);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test7()
|
||||||
|
{
|
||||||
|
var actual = new IdentityParser().Parse2();
|
||||||
|
Assert.AreEqual("ABZ", actual?.Prefix);
|
||||||
|
Assert.AreEqual(1, actual?.Index);
|
||||||
|
Assert.AreEqual(1, actual?.Revision);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test8()
|
||||||
|
{
|
||||||
|
Assert.IsTrue(Identity.TryParse("TOPFTP0000123-12", out var actual));
|
||||||
|
Assert.AreEqual("TOPFTP", actual.Prefix);
|
||||||
|
Assert.AreEqual(123, actual.Index);
|
||||||
|
Assert.AreEqual(12, actual.Revision);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test9()
|
||||||
|
{
|
||||||
|
Assert.IsTrue(Identity.TryParse("WPR0001023-12", out var actual));
|
||||||
|
Assert.AreEqual("WPR", actual.Prefix);
|
||||||
|
Assert.AreEqual(1023, actual.Index);
|
||||||
|
Assert.AreEqual(12, actual.Revision);
|
||||||
|
}
|
||||||
|
|
||||||
|
[Test]
|
||||||
|
public void Test10()
|
||||||
|
{
|
||||||
|
Assert.IsFalse(Identity.TryParse("WPR0001023+12", out _));
|
||||||
|
Assert.IsFalse(Identity.TryParse("Peter", out _));
|
||||||
|
Assert.IsFalse(Identity.TryParse("NCL1-1", out _));
|
||||||
|
Assert.IsFalse(Identity.TryParse("NCL0000001-0", out _));
|
||||||
|
Assert.IsFalse(Identity.TryParse("NCL0000000-1", out _));
|
||||||
|
Assert.IsFalse(Identity.TryParse("Nc0000001-1", out _));
|
||||||
|
Assert.IsFalse(Identity.TryParse("0000001-1", out _));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
118
TrailingNumberFromString.cs
Normal file
118
TrailingNumberFromString.cs
Normal file
@ -0,0 +1,118 @@
|
|||||||
|
using System;
|
||||||
|
using System.Runtime.CompilerServices;
|
||||||
|
using System.Text.RegularExpressions;
|
||||||
|
using BenchmarkDotNet.Attributes;
|
||||||
|
|
||||||
|
namespace Benchmark
|
||||||
|
{
|
||||||
|
[MemoryDiagnoser]
|
||||||
|
public class TrailingNumberFromString
|
||||||
|
{
|
||||||
|
private readonly Regex _regex = new Regex(@"^\d$", RegexOptions.Compiled);
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public int? GetTrailingNumberFromString1()
|
||||||
|
{
|
||||||
|
const string foo = "Test1234";
|
||||||
|
string sValue = null;
|
||||||
|
|
||||||
|
for (var i = foo.Length - 1; i >= 0; i--)
|
||||||
|
{
|
||||||
|
var regex = new Regex(@"^\d$");
|
||||||
|
|
||||||
|
if (regex.IsMatch(foo[i].ToString()))
|
||||||
|
sValue = foo[i] + sValue;
|
||||||
|
else
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (sValue != null)
|
||||||
|
return Convert.ToInt32(sValue);
|
||||||
|
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public int? GetTrailingNumberFromString2()
|
||||||
|
{
|
||||||
|
const string foo = "Test1234";
|
||||||
|
string sValue = null;
|
||||||
|
|
||||||
|
for (var i = foo.Length - 1; i >= 0; i--)
|
||||||
|
{
|
||||||
|
if (_regex.IsMatch(foo[i].ToString()))
|
||||||
|
sValue = foo[i] + sValue;
|
||||||
|
else
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
if (sValue != null)
|
||||||
|
return Convert.ToInt32(sValue);
|
||||||
|
|
||||||
|
return null;
|
||||||
|
}
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public int? GetTrailingNumberFromString3()
|
||||||
|
{
|
||||||
|
const string foo = "Test1234";
|
||||||
|
var result = 0;
|
||||||
|
|
||||||
|
for (var i = foo.Length - 1; i >= 0; i--)
|
||||||
|
{
|
||||||
|
if (foo[i] >= 48 && foo[i] <= 58)
|
||||||
|
{
|
||||||
|
var value = foo[i] - 48;
|
||||||
|
result += value * (int) Math.Pow(10, foo.Length - i - 1);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public int? GetTrailingNumberFromString4()
|
||||||
|
{
|
||||||
|
const string foo = "Test1234";
|
||||||
|
var result = 0;
|
||||||
|
|
||||||
|
for (var i = foo.Length - 1; i >= 0; i--)
|
||||||
|
{
|
||||||
|
if (foo[i] >= 48 && foo[i] <= 58)
|
||||||
|
{
|
||||||
|
var value = foo[i] - 48;
|
||||||
|
result += value * IntegerPow(10, foo.Length - i - 1);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
[MethodImpl(MethodImplOptions.AggressiveInlining)]
|
||||||
|
private static int IntegerPow(int x, int y)
|
||||||
|
{
|
||||||
|
if (y == 0) return 1;
|
||||||
|
var result = x;
|
||||||
|
for (var i = 1; i < y; i++)
|
||||||
|
{
|
||||||
|
result *= x;
|
||||||
|
}
|
||||||
|
|
||||||
|
return result;
|
||||||
|
}
|
||||||
|
|
||||||
|
[Benchmark]
|
||||||
|
public int? GetTrailingNumberFromString5()
|
||||||
|
{
|
||||||
|
const string foo = "Test1234";
|
||||||
|
var regex = new Regex(@"\d+$");
|
||||||
|
var match = regex.Match(foo);
|
||||||
|
return match.Success && int.TryParse(match.Value, out var result) ? result : default(int?);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
Loading…
x
Reference in New Issue
Block a user