public void PerformanceTest([Values(1,10)] int attachCount)
{
var target = new EventTarget();
var sw = new Stopwatch();
var eventRaiseCalls = 10000000;
var expectedCalls = attachCount * eventRaiseCalls;
for (int i = 0; i < attachCount; i++)
{
target.OrdinaryEvent += Target_OrdinaryEvent;
target.WeakEvent += Target_OrdinaryEvent;
target.WeakEventSource += Target_OrdinaryEvent;
}
sw.Reset();
sw.Start();
RaiseEvents(eventRaiseCalls, () => target.RaiseOrdinaryEvent());
var ordinary = sw.ElapsedMilliseconds;
Assert.That(target.CallCount, Is.EqualTo(expectedCalls), "call count mismatch RaiseOrdinaryEvent");
target.CallCount = 0;
sw.Reset();
sw.Start();
RaiseEvents(eventRaiseCalls, () => target.RaiseWeakEventSource());
var wes = sw.ElapsedMilliseconds;
Assert.That(target.CallCount, Is.EqualTo(expectedCalls), "call count mismatch RaiseWeakEventSource");
target.CallCount = 0;
sw.Reset();
sw.Start();
RaiseEvents(eventRaiseCalls, () => target.RaiseWeakEvent());
var we = sw.ElapsedMilliseconds;
Assert.That(target.CallCount, Is.EqualTo(expectedCalls), "call count mismatch RaiseWeakEvent");
target.CallCount = 0;
var top = (wes / 100) * 103;
Console.Out.WriteLine($"{nameof(EventTarget.OrdinaryEvent)} {ordinary}");
Console.Out.WriteLine($"{nameof(EventTarget.WeakEventSource)} {wes}");
Console.Out.WriteLine($"{nameof(EventTarget.WeakEvent)} {we}");
Console.Out.WriteLine($"top {top}");
Assert.That(ordinary, Is.LessThanOrEqualTo(we), "ordinary should be the fastest");
if (we < wes && we > 0)
{
var p = ((wes/we)*100L);
Console.Out.WriteLine($"WeakEvent execution time is {p}% relative to {nameof(wes)}");
}
}
