gistfile1.cs

//Web API using WCF to Self-host
//Time to create init Server and Start HttpListener: 0
//Time for roundtrip: 302 body = {"Foo":"Bar"}
//Time for 2nd roundtrip (new WebRequest): 0 Body = {"Foo":"Bar"}

//Servicestack
//Time to create init AppHost and Start HttpListener: 129
//Time for roundtrip: 176 body = {"Foo":"Bar"}
//Time for 2nd roundtrip (new WebRequest): 0 Body = {"Foo":"Bar"}

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Web.Http;
using System.Web.Http.SelfHost;

namespace ConsoleApplication3
{
    public class Test
    {
        public string Foo { get; set; }
    }


    public class TestController : ApiController
    {
        public Test Get([FromUri]Test request)
        {
            return new Test { Foo = request.Foo };
        }
    }

    class Program
    {
        
        static void Main(string[] args) {

            Stopwatch s = new Stopwatch();


            var config = new HttpSelfHostConfiguration("http://localhost:8080");
            config.Routes.MapHttpRoute("default", "json/syncreply/{controller}");
            var server = new HttpSelfHostServer(config);
            server.OpenAsync().Wait();

            s.Stop();

            Console.WriteLine("Time to create init Server and Start HttpListener: " + s.ElapsedMilliseconds);

            s.Reset();
            s.Start();

            var client = new HttpClient();
            var body = client.GetAsync("http://localhost:8080/json/syncreply/Test?Foo=Bar").Result.Content.ReadAsStringAsync().Result;

            s.Stop();

            Console.WriteLine("Time for roundtrip: " + s.ElapsedMilliseconds + " body = " + body);

            s.Reset();
            s.Start();

            body = client.GetAsync("http://localhost:8080/json/syncreply/Test?Foo=Bar").Result.Content.ReadAsStringAsync().Result;
            s.Stop();

            Console.WriteLine("Time for 2nd roundtrip (new WebRequest / No keep-alive): " + s.ElapsedMilliseconds + " Body = " + body);

            Console.ReadLine();
            server.CloseAsync().Wait();
        }
    }
}