DelegatesVsVanillaObserver.cs

[Test]
public void DelegatesVsVanillaSubscriberList()
{
    const int count = 10000;
    var observerImplementation = new ObserverImplementation();
    var sw = new Stopwatch();
    sw.Start();
    Action action = () => { };
    for (int i = 0; i < count; i++)
    {
        action += observerImplementation.Action;
    }
    sw.Stop();
    Debug.Log("Action list creation " + sw.ElapsedMilliseconds);

    sw.Reset();
    sw.Start();
    action();
    sw.Stop();
    Debug.Log("Action call " + sw.ElapsedMilliseconds);

    sw.Reset();
    sw.Start();
    List<IObserver> observers = new List<IObserver>();
    observers.Add(new EmptyObserver());
    for (int i = 1; i < count + 1; i++)
    {
        observers.Add(new ObserverImplementation());
    }
    sw.Stop();
    Debug.Log("Observers addition " + sw.ElapsedMilliseconds);

    sw.Reset();
    sw.Start();
    foreach (var observer in observers)
    {
        observer.Action();
    }
    sw.Stop();
    Debug.Log("Observers call " + sw.ElapsedMilliseconds);
}

private interface IObserver
{
    void Action();
}

private class EmptyObserver : IObserver
{
    public void Action()
    {

    }
}

private class ObserverImplementation : IObserver
{
    public void Action()
    {
        // Useless work
        var integer = 0;
        integer += 153;
        var floating = integer / 0.3f;
    }
}