HMAC benchmarks

benchmark.csproj

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

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net6.0</TargetFramework>
    <RootNamespace>benchmark_scratch</RootNamespace>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
  </PropertyGroup>

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

</Project>

program.cs

using System.Security.Cryptography;
using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;

BenchmarkRunner.Run<HmacBenchMark>();

[MemoryDiagnoser]
public class HmacBenchMark
{
    private readonly byte[] _hmacKey = RandomNumberGenerator.GetBytes(32);
    private readonly byte[] _hmacData = RandomNumberGenerator.GetBytes(32);

    [Benchmark]
    public byte[] HmacCreateDispose()
    {
        using (HMACSHA1 hmac = new HMACSHA1(_hmacKey))
        {
            return hmac.ComputeHash(_hmacData);
        }
    }

    [Benchmark]
    public byte[] HmacOneShot()
    {
        return HMACSHA1.HashData(_hmacKey, _hmacData);
    }
}