C #, the efficiency difference between reflection and direct invocation

Reflection, because the compiler to determine permissions, identity and other operations, so it is slower than direct operation

Test code:

            Const intNUM =1000000; Stopwatch SW=NewStopwatch (); Sw.            Start ();  for(inti =0; i < NUM; i++) {Reflecttest rt=Newreflecttest (); Rt.            Countsomething (); } SW.            Stop (); Console.WriteLine (SW.            Elapsedticks); Sw.            Reset (); Sw.            Start ();  for(inti =0; i < NUM; i++) {Assembly Assembly=assembly.getexecutingassembly (); Type T= assembly. GetType ("consoleapplication1.reflecttest"); ConstructorInfo ConstructorInfo= T.getconstructors (). (c =c.getparameters (). Length).                FirstOrDefault (); Objectobj = Constructorinfo.invoke (New Object[Constructorinfo.getparameters ().                Length]); //Object obj = activator.createinstance (t);MethodInfo MethodInfo = T.getmethod ("countsomething"); Methodinfo.invoke (obj,New Object[Methodinfo.getparameters ().            Length]); } SW.            Stop (); Console.WriteLine (SW.            Elapsedticks); Console.readkey ();

Results:

Reflection time is 2 to 3 times times the direct call, so non-special needs, the project do not use reflection bar ...

C #, the efficiency difference between reflection and direct invocation