public void CreateAsFuncTypeSafe_ConstructorInfo_Performance(int iterations)
{
ConstructorInfo ci = typeof(TestClass).GetConstructor(new Type[] { typeof(string) });
TestClass tc = new TestClass("injected");
TestClass tcResult;
Func <object[], TestClass> fast = ci.CreateAsFastInvoke <TestClass>();
DateTime start;
TimeSpan diff;
string test = string.Empty;
string test2 = string.Empty;
string test3 = string.Empty;
double firstTimePerCall;
double secondTimePerCall;
double thirdTimePerCall;
// start
Console.WriteLine("CreateAsFuncTypeSafe_ConstructorInfo_Performance() Performance Test");
// reflection
tcResult = null;
start = DateTime.Now;
for (int i = 0; i < iterations; i++)
{
tcResult = ci.Invoke(new object[] { "injected" }) as TestClass;
}
diff = DateTime.Now - start;
Assert.IsNotNull(tcResult);
firstTimePerCall = diff.TotalMilliseconds / (double)iterations;
Console.WriteLine(String.Format("Per Call (reflection): {0} ms", firstTimePerCall));
// fast invoke
tcResult = null;
start = DateTime.Now;
for (int i = 0; i < iterations; i++)
{
tcResult = fast(new object[] { "injected" });
}
diff = DateTime.Now - start;
Assert.IsNotNull(tcResult);
secondTimePerCall = diff.TotalMilliseconds / (double)iterations;
Console.WriteLine(String.Format("Per Call (fast invoke): {0} ms", secondTimePerCall));
// native invoke
tcResult = null;
start = DateTime.Now;
for (int i = 0; i < iterations; i++)
{
tcResult = new TestClass("injected");
}
diff = DateTime.Now - start;
Assert.IsNotNull(tcResult);
thirdTimePerCall = diff.TotalMilliseconds / (double)iterations;
Console.WriteLine(String.Format("Per Call (native call): {0} ms", thirdTimePerCall));
// ratios
Console.WriteLine(string.Format("Reflection/Fast Invoke Ratio: {0}", (firstTimePerCall / secondTimePerCall)));
Console.WriteLine(string.Format("Fast Invoke/Native Invoke Ratio: {0}", (secondTimePerCall / thirdTimePerCall)));
}
