using System;

using System.Collections.Generic;

using System.Diagnostics;

using System.IO;

using System.Linq;

using System.Reflection;

namespace SharpTime

{

class Program

{

private static int repeatCount = 1;

static void Main()

{

repeatCount = 10000;

var l = new Loader();

Time("Startup time", () => l.Load("StubClass.dll"));

Time("Create", () => Iter(() => l.Create("StubClass.Output")));

Time("Int", () => Iter(() => l.Call("ReturnInt")));

Time("String", () => Iter(() => l.Call("ReturnString")));

Time("Array", () => Iter(() => l.Call("ReturnArray")));

Time("List", () => Iter(() => l.Call("ReturnList")));

Time("Object", () => Iter(() => l.Call("ReturnObject")));

repeatCount = 1000000;

var intArr = new [] {1, 2, 3, 4};

Time("Int static", () => Iter(() => 4));

Time("String static", () => Iter(() => "ReturnString"));

Time("Array static", () => Iter(() => new[] {1, 2, 3}));

Time("List static", () => Iter(() => new List<int>(intArr)));

Time("Object static", () => Iter(() => new RetVal(1,"str")));

}

[DebuggerStepThrough]

static void Time(string name, Action method)

{

var s = new Stopwatch();

s.Start();

method();

s.Stop();

Console.WriteLine("{0}: {1}ms", name, s.ElapsedMilliseconds);

}

[DebuggerStepThrough]

static void Iter(Action method)

{

for(int i=0; i < repeatCount; i++)

{

method();

}

}

[DebuggerStepThrough]

static void Iter<T>(Func<T> method)

{

for (int i = 0; i < repeatCount; i++)

{

method();

}

}

private class RetVal

{

private readonly int intVal;

private readonly string strVal;

public RetVal(int i, string s)

{

intVal = i;

strVal = s;

}

public override string ToString()

{

return String.Format("{0},{1}", strVal, intVal);

}

}

}

internal class Loader

{

private Assembly _assembly;

private Object _instance;

private Type _type;

public Loader()

{

_assembly = null;

}

public void Load(string name)

{

string path = Directory.EnumerateFiles(Environment.CurrentDirectory, name).First();

_assembly = Assembly.LoadFile(path);

}

public void Create(string type)

{

_instance = _assembly.CreateInstance(type);

if (_instance == null) throw new ArgumentException("Type was not found", "type");

_type = _instance.GetType();

}

public object Call(string method, params object[] args)

{

MethodInfo mi = _type.GetMethod(method);

if (mi == null) throw new ArgumentException("method was not found", "method");

return mi.Invoke(_instance, args);

}

}

}