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

BenchmarkSwitcher
    .FromAssembly(typeof(ExceptionBench).Assembly)
    .Run(args);

[MemoryDiagnoser]
[SimpleJob(warmupCount: 3, iterationCount: 10)]
public class ExceptionBench
{
    private static volatile int _sink;

    [Benchmark]
    public void ThrowCatch()
    {
        try
        {
            Thrower();
        }
        catch (InvalidOperationException ex)
        {
            _sink = ex.HResult;
        }
    }

    private static void Thrower()
    {
        throw new InvalidOperationException("boom");
    }

    [Benchmark]
    public void NullRefThrow()
    {
        try
        {
            object o = null!;
            _ = o.ToString(); // NullRef
        }
        catch
        {
        }
    }

    [Benchmark]
    public void Rethrow()
    {
        try
        {
            try
            {
                Thrower();
            }
            catch
            {
                throw;
            }
        }
        catch
        {
        }
    }
}