using BenchmarkDotNet.Attributes;
using BenchmarkDotNet.Diagnosers;
using BenchmarkDotNet.Running;
using System;
using System.Threading.Tasks;
using System.Threading;

[MemoryDiagnoser]
public class Program
{
    public static void Main(string[] args) => BenchmarkSwitcher.FromAssembly(typeof(Program).Assembly).Run(args);

    private SemaphoreSlim _sem = new SemaphoreSlim(0, 1);
    private CancellationTokenSource _cts = new CancellationTokenSource();

    [Benchmark]
    public Task WithCT()
    {
        Task t = _sem.WaitAsync(_cts.Token);
        _sem.Release();
        return t;
    }

    [Benchmark]
    public Task WithTimeout()
    {
        Task t = _sem.WaitAsync(TimeSpan.FromMinutes(1));
        _sem.Release();
        return t;
    }

    [Benchmark]
    public Task WithCTandTimeout()
    {
        Task t = _sem.WaitAsync(TimeSpan.FromMinutes(1), _cts.Token);
        _sem.Release();
        return t;
    }
}