With the famous BenchmarkDotNet library you can benchmark a lot - but it doesn't stop with a single .NET version. You can benchmark multiple versions of the same code that targets different runtimes!
The setup#
To run multiple versions of your code, you have to select multiple target frameworks in your csproj file:
xml
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<ImplicitUsings>enable</ImplicitUsings>
<Nullable>enable</Nullable>
<LangVersion>preview</LangVersion>
<AllowUnsafeBlocks>true</AllowUnsafeBlocks>
<TargetFrameworks>net7.0;net8.0</TargetFrameworks>
</PropertyGroup>
<ItemGroup>
<PackageReference Include="BenchmarkDotNet" Version="0.13.6" />
</ItemGroup>
</Project>
Then inside your BenchmarkDotNet test you can define via the SimpleJobAttribute the target runtime.
csharp
[SimpleJob(RuntimeMoniker.Net70, baseline: true)]
[SimpleJob(RuntimeMoniker.Net80)]
[MemoryDiagnoser]
public class InterpolatedEnumBenchmark
{
[Benchmark]
public string Interpolated()
=> $"{Weekdays.Monday} {Weekdays.Tuesday} {Weekdays.Wednesday} {Weekdays.Thursday} {Weekdays.Friday} {Weekdays.Saturday} {Weekdays.Sunday}";
}
public enum Weekdays
{
Monday,
Tuesday,
Wednesday,
Thursday,
Friday,
Saturday,
Sunday
}
The result will look like this:
no-class
BenchmarkDotNet v0.13.6, macOS Ventura 13.4.1 (22F82) [Darwin 22.5.0]
Apple M1 Pro, 1 CPU, 10 logical and 10 physical cores
.NET SDK 8.0.100-preview.6.23330.14
[Host] : .NET 7.0.5 (7.0.523.17405), Arm64 RyuJIT AdvSIMD
.NET 7.0 : .NET 7.0.5 (7.0.523.17405), Arm64 RyuJIT AdvSIMD
.NET 8.0 : .NET 8.0.0 (8.0.23.32907), Arm64 RyuJIT AdvSIMD
| Method | Job | Runtime | Mean | Error | StdDev | Ratio | Gen0 | Allocated | Alloc Ratio |
|------------- |--------- |--------- |----------:|---------:|---------:|------:|-------:|----------:|------------:|
| Interpolated | .NET 7.0 | .NET 7.0 | 148.66 ns | 2.008 ns | 1.780 ns | 1.00 | 0.0484 | 304 B | 1.00 |
| Interpolated | .NET 8.0 | .NET 8.0 | 61.37 ns | 0.888 ns | 0.831 ns | 0.41 | 0.0216 | 136 B | 0.45 |
