Add StringBuilderPerf

Author: linkdotnet

AutoFixtureXUnit/UnitTests.cs

@@ -9,11 +9,7 @@ public class UnitTest1
     [AutoData]
     public void TestOne(string name)
     {
-        var sut = new MyFooService();
-
-        var result = sut.MyCall(name);
 
-        Assert.NotNull(result);
     }
 
     [Theory]

README.md

@@ -4,6 +4,7 @@ Contains all of my examples from various blog posts. You can find a comprehensiv
 
 | BlogPost                                                                                 | Publish Date |
 | ---------------------------------------------------------------------------------------- | ------------ |
+| ["Use always a StringBuilder" - Internet myths](StringBuilderPerformance/)               | 20.11.2022   |
 | [Anonymous test data with AutoFixture](AutoFixtureXUnit/)                                | 19.11.2022   |
 | [LiteDB - A .NET embedded NoSQL database](LiteDatabase/)                                 | 19.10.2022   |
 | [Cursed C# - Doing shenanigans in C#](CursedCSharp/)                                     | 15.10.2022   |

StringBuilderPerformance/Program.cs

@@ -0,0 +1,44 @@
+using System.Text;
+using BenchmarkDotNet.Attributes;
+using BenchmarkDotNet.Running;
+
+BenchmarkRunner.Run<StringBuilderBenchmark>();
+
+[MemoryDiagnoser]
+public class StringBuilderBenchmark
+{
+    private const string TextToAppend = "Hello World from Steven";
+
+    [Params(5, 10, 25)]
+    public int Iterations { get; set; }
+
+    [Benchmark]
+    public string StringBuilder()
+    {
+        var builder = new StringBuilder();
+        for (var i = 0; i < Iterations; i++)
+            builder.Append(TextToAppend);
+
+        return builder.ToString();
+    }
+
+    [Benchmark]
+    public string ListOfStrings()
+    {
+        var list = new List<string>();
+        for(var i = 0; i< Iterations;i++)
+            list.Add(TextToAppend);
+
+        return string.Join(string.Empty, list);
+    }
+
+    [Benchmark]
+    public string Concat()
+    {
+        var output = string.Empty;
+        for (var i = 0; i < Iterations; i++)
+            output += TextToAppend;
+
+        return output;
+    }
+}

StringBuilderPerformance/README.md

@@ -0,0 +1,9 @@
+# "Use always a StringBuilder" - Internet myths
+
+> Use always a `StringBuilder`
+
+That is what you can read from time to time. The basic idea is, that a `StringBuilder` is "better" ^to be defined^.
+
+Why are people telling that ^lie^? Let's discuss this and see what it isn't true.
+
+Found [here](https://steven-giesel.com/blogPost/480539f1-98ab-45bc-ba24-9ccec65b459a)

StringBuilderPerformance/StringBuilderPerformance.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <OutputType>Exe</OutputType>
+        <TargetFramework>net7.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="BenchmarkDotNet" Version="0.13.2" />
+    </ItemGroup>
+
+</Project>

StringBuilderPerformance/StringBuilderPerformance.sln

@@ -0,0 +1,16 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "StringBuilderPerformance", "StringBuilderPerformance.csproj", "{1098C5A1-15C2-4567-AFB5-6668173E4C39}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{1098C5A1-15C2-4567-AFB5-6668173E4C39}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1098C5A1-15C2-4567-AFB5-6668173E4C39}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1098C5A1-15C2-4567-AFB5-6668173E4C39}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1098C5A1-15C2-4567-AFB5-6668173E4C39}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+EndGlobal