public static void Main()
{
    var bench = new Bench();
    var action = bench.Benchmark1;
    Warmup(action);

    // Switch these lines to observe 0 allocated bytes.
    var frameworkDescription = RuntimeInformation.FrameworkDescription;
    //var frameworkDescription = "";

    var initial = GetAllocatedBytes();
    action();
    var final = GetAllocatedBytes();

    Console.WriteLine($"allocated bytes: {final - initial}");

    GC.KeepAlive(frameworkDescription);
}

static long GetAllocatedBytes()
{
    GC.Collect(); // We only observe allocated bytes when GC.Collect() is called.
    return GC.GetTotalAllocatedBytes(precise: true);
}

static void Warmup(Action action)
{
    for (int i = 0; i < 100; i++)
    {
        action();
    }
}

public class Bench
{
    public void Benchmark1() => TestMethod();
    
    [MethodImpl(MethodImplOptions.NoInlining)]
    public static ulong TestMethod()
    {
        var r = 1ul;
        for (var i = 0; i < 50_000_000; i++)
        {
            r /= 1;
        }
        return r;
    }
}