private static Func <TReturn> CreateLCGApproach <TArg, TReturn>(Func <TArg, TReturn> f, TArg arg)
{
if (f.Target != null)
{
throw new ArgumentException();
}
var factory = FactoryMethodHelper <TArg, TReturn> .GetFactory(f.Method);
Func <TReturn> simpleWrapper = factory(arg);
return(simpleWrapper);
}
static void Main(string[] args)
{
var f = new Func <string, string>(Extensions.SomeAction);
var ctor = typeof(Func <string>).GetConstructors().Single();
var factory = FactoryMethodHelper <string, string> .GetFactory(f.Method);
const int iterations = 50000;
var ctorTimer = new Stopwatch();
var delegateTimer = new Stopwatch();
var baselineTimer = new Stopwatch();
var lcgTimer = new Stopwatch();
var lcgPreFactoryTimer = new Stopwatch();
var extensionMethodTimer = new Stopwatch();
for (int i = 0; i < iterations; i++)
{
ctorTimer.Start();
string result = A1(f, ctor);
ctorTimer.Stop();
delegateTimer.Start();
result = A2(f);
delegateTimer.Stop();
baselineTimer.Start();
result = A3(f);
baselineTimer.Stop();
lcgTimer.Start();
result = A4(f);
lcgTimer.Stop();
lcgPreFactoryTimer.Start();
result = A5(f, factory);
lcgPreFactoryTimer.Stop();
extensionMethodTimer.Start();
result = A6();
extensionMethodTimer.Stop();
}
Console.WriteLine("Func<>.ctor: {0}", ctorTimer.ElapsedMilliseconds);
Console.WriteLine("Delegate: {0}", delegateTimer.ElapsedMilliseconds);
Console.WriteLine("Baseline: {0}", baselineTimer.ElapsedMilliseconds);
Console.WriteLine("LCG: {0}", lcgTimer.ElapsedMilliseconds);
Console.WriteLine("LCG (pref): {0}", lcgPreFactoryTimer.ElapsedMilliseconds);
Console.WriteLine("Ext. method: {0}", extensionMethodTimer.ElapsedMilliseconds);
}