void Main()
{
    var iterations = 10000000;
    var foos = new Foo[iterations];

    var repeats = 10;

    var factories = new Func<Foo>[]
    {
        () => new Foo(),
        () => (Foo)Activator.CreateInstance(typeof(Foo)),
        () => FooBar<Foo>.Create(),
    };

    var timestamps = new double[factories.Length + 1];
    var durations = new double[factories.Length];

    foreach (var factory in factories)
    {
        factory();
    }

    var sw = Stopwatch.StartNew();

    GC.Collect();
    GC.WaitForPendingFinalizers();

    for (int repeat = 0; repeat < repeats; repeat++)
    {
        var cc0 = GC.CollectionCount(0);
        for (int f = 0; f < factories.Length; f++)
        {
            timestamps[f] = sw.Elapsed.TotalMilliseconds;
            for (int i = 0; i < iterations; i++)
            {
                foos[i] = factories[f]();
                //factories[f]();
            }
        }
        timestamps[factories.Length] = sw.Elapsed.TotalMilliseconds;
        for (int i = 0; i < 3; i++)
        {
            durations[i] += timestamps[i + 1] - timestamps[i];
        }
        Console.WriteLine(GC.CollectionCount(0) - cc0);
    }
    for (int i = 0; i < 3; i++)
    {
        Console.WriteLine(durations[i] / repeats);
    }
}

public class Foo { }

class FooBar<T> where T : new()
{
    public static T Create()
    {
        return new T();
    }
}