Source used in a tweet

delegate_invoke_benchmark.cs

using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Running;
using System;
using System.Linq;

public class Program {
    static void Main(string[] args) => BenchmarkRunner.Run(typeof(Program));

    private Func<int, int> _delegateToStaticMethod;
    private Func<int, int> _delegateToInstanceMethod;

    private static int StaticTarget(int x) => x + 1;

    private int InstanceTarget(int x) => x + 1;

    [GlobalSetup]
    public void Setup() {
        _delegateToStaticMethod = StaticTarget;
        _delegateToInstanceMethod = InstanceTarget;
    }


    [Benchmark]
    public int DelegateToInstanceMethodInt() =>_delegateToInstanceMethod(1);

    [Benchmark]
    public int DelegateToStaticMethodInt() => _delegateToStaticMethod(1);

    [Benchmark]
    public void DelegateToInstanceMethodVoid() => _delegateToInstanceMethod(1);

    [Benchmark]
    public void DelegateToStaticMethodVoid() => _delegateToStaticMethod(1);

}