SwitchCaseIfElseBenchmark

Program.cs

using System.Runtime.CompilerServices;
using System.Threading;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Jobs;
using BenchmarkDotNet.Running;

namespace SwitchCaseIfElseBenchmark
{
    public static class Program
    {
        public static void Main()
        {
            var summary = BenchmarkRunner.Run(typeof(GraphTenantBenchmark).Assembly);
        }
    }

    [MemoryDiagnoser]
    [SimpleJob(RuntimeMoniker.Net462, baseline: true)]
    [SimpleJob(RuntimeMoniker.Net60)]
    public class GraphTenantBenchmark
    {
        [Benchmark(Baseline = true)]
        [Arguments("one")]
        [Arguments("two")]
        [Arguments("three")]
        [Arguments("four")]
        [Arguments("five")]
        public int IfElse(string input)
        {
            if (EqualsAndWait(input, "one"))
            {
                return 1;
            }
            if (EqualsAndWait(input, "two"))
            {
                return 2;
            }
            if (EqualsAndWait(input, "three"))
            {
                return 3;
            }
            if (EqualsAndWait(input, "four"))
            {
                return 4;
            }
            if (EqualsAndWait(input, "five"))
            {
                return 5;
            }

            return -1;
        }

        [MethodImpl(MethodImplOptions.AggressiveInlining)]
        private static bool EqualsAndWait(string input, string value)
        {
            Thread.Sleep(100);
            return input == value;
        }

        [Benchmark]
        [Arguments("one")]
        [Arguments("two")]
        [Arguments("three")]
        [Arguments("four")]
        [Arguments("five")]
        public int SwitchCase(string input)
        {
            switch (input)
            {
                case "one":
                {
                    Thread.Sleep(100);
                    return 1;
                }
                case "two":
                {
                    Thread.Sleep(100);
                    return 2;
                }
                case "three":
                {
                    Thread.Sleep(100);
                    return 3;
                }
                case "four":
                {
                    Thread.Sleep(100);
                    return 4;
                }
                case "five":
                {
                    Thread.Sleep(100);
                    return 5;
                }
                default:
                {
                    Thread.Sleep(100);
                    return -1;
                }
            }
        }
    }
}

Results.txt

|     Method |                  Job |              Runtime | input |     Mean |   Error |  StdDev | Ratio | RatioSD | Allocated |
|----------- |--------------------- |--------------------- |------ |---------:|--------:|--------:|------:|--------:|----------:|
|     IfElse |             .NET 6.0 |             .NET 6.0 |  five | 546.1 ms | 3.44 ms | 3.05 ms |  1.00 |    0.01 |   4,024 B |
| SwitchCase |             .NET 6.0 |             .NET 6.0 |  five | 109.2 ms | 0.77 ms | 0.72 ms |  0.20 |    0.00 |     728 B |
|     IfElse | .NET Framework 4.6.2 | .NET Framework 4.6.2 |  five | 545.4 ms | 4.86 ms | 4.31 ms |  1.00 |    0.00 |         - |
| SwitchCase | .NET Framework 4.6.2 | .NET Framework 4.6.2 |  five | 108.7 ms | 0.74 ms | 0.69 ms |  0.20 |    0.00 |         - |
|            |                      |                      |       |          |         |         |       |         |           |
|     IfElse |             .NET 6.0 |             .NET 6.0 |  four | 434.6 ms | 2.81 ms | 2.63 ms |  1.00 |    0.02 |     480 B |
| SwitchCase |             .NET 6.0 |             .NET 6.0 |  four | 108.7 ms | 0.96 ms | 0.90 ms |  0.25 |    0.00 |     728 B |
|     IfElse | .NET Framework 4.6.2 | .NET Framework 4.6.2 |  four | 435.4 ms | 6.10 ms | 5.71 ms |  1.00 |    0.00 |         - |
| SwitchCase | .NET Framework 4.6.2 | .NET Framework 4.6.2 |  four | 108.9 ms | 0.81 ms | 0.76 ms |  0.25 |    0.00 |         - |
|            |                      |                      |       |          |         |         |       |         |           |
|     IfElse |             .NET 6.0 |             .NET 6.0 |   one | 108.8 ms | 0.71 ms | 0.66 ms |  1.00 |    0.01 |     733 B |
| SwitchCase |             .NET 6.0 |             .NET 6.0 |   one | 108.4 ms | 1.21 ms | 1.13 ms |  0.99 |    0.01 |     728 B |
|     IfElse | .NET Framework 4.6.2 | .NET Framework 4.6.2 |   one | 109.3 ms | 1.02 ms | 0.95 ms |  1.00 |    0.00 |         - |
| SwitchCase | .NET Framework 4.6.2 | .NET Framework 4.6.2 |   one | 108.7 ms | 0.68 ms | 0.61 ms |  0.99 |    0.01 |         - |
|            |                      |                      |       |          |         |         |       |         |           |
|     IfElse |             .NET 6.0 |             .NET 6.0 | three | 327.2 ms | 4.13 ms | 3.86 ms |  1.00 |    0.01 |   1,832 B |
| SwitchCase |             .NET 6.0 |             .NET 6.0 | three | 108.4 ms | 0.60 ms | 0.50 ms |  0.33 |    0.00 |     728 B |
|     IfElse | .NET Framework 4.6.2 | .NET Framework 4.6.2 | three | 326.8 ms | 2.05 ms | 1.81 ms |  1.00 |    0.00 |         - |
| SwitchCase | .NET Framework 4.6.2 | .NET Framework 4.6.2 | three | 109.5 ms | 1.04 ms | 0.97 ms |  0.34 |    0.00 |         - |
|            |                      |                      |       |          |         |         |       |         |           |
|     IfElse |             .NET 6.0 |             .NET 6.0 |   two | 218.0 ms | 1.55 ms | 1.37 ms |  1.00 |    0.01 |     160 B |
| SwitchCase |             .NET 6.0 |             .NET 6.0 |   two | 108.9 ms | 0.94 ms | 0.88 ms |  0.50 |    0.01 |     728 B |
|     IfElse | .NET Framework 4.6.2 | .NET Framework 4.6.2 |   two | 217.8 ms | 1.42 ms | 1.26 ms |  1.00 |    0.00 |         - |
| SwitchCase | .NET Framework 4.6.2 | .NET Framework 4.6.2 |   two | 108.7 ms | 0.83 ms | 0.78 ms |  0.50 |    0.00 |         - |

SwitchCaseIfElseBenchmark.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFrameworks>net6.0;net462</TargetFrameworks>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="BenchmarkDotNet" Version="0.13.1" />
  </ItemGroup>

</Project>