runs at http://localhost:9090/
/// <reference path="node-vsdoc.js" />
var http = require("http");
http.createServer(function (request, response) {
response.writeHead(200, {"Content-Type":"text/html" });
response.write("<p>
hello, world!
</p>");
response.end();
}).listen(9090);

hosted by iis at http://localhost/test/
<p>
hello, world!
</p>

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

namespace HttpBench
{
class Program
{
    private int TotalCount = 100000;
    private int ConcurrentThreads = 1000;
    private int failedCount;
    private int totalBytes;
    private int totalTime;
    private int completedCount;
    private static object lockObj = new object();

    /// <summary>
    /// main entry point
    /// </summary>
    static void Main(string[] args)
    {
        Program p = new Program();
        p.Run(args);
    }

    /// <summary>
    /// actual execution
    /// </summary>
    private void Run(string[] args)
    {
        // check command line
        if (args.Length == 0)
        {
            this.PrintUsage();
            return;
        }
        if (args[0] =="/?" || args[0] =="/h")
        {
            this.PrintUsage();
            return;
        }

        // use parallel library, download data
        ParallelOptions options = new ParallelOptions();
        options.MaxDegreeOfParallelism = this.ConcurrentThreads;
        int start = Environment.TickCount;
        Parallel.For(0, this.TotalCount, options, i =>
            {
                this.DownloadUrl(i, args[0]);
            }
        );
        int end = Environment.TickCount;

        // print results
        this.Print("Total requests sent: {0}", true, this.TotalCount);
        this.Print("Concurrent threads: {0}", true, this.ConcurrentThreads);
        this.Print("Total completed requests: {0}", true, this.completedCount);
        this.Print("Failed requests: {0}", true, this.failedCount);
        this.Print("Sum total of thread times (seconds): {0}", true, this.totalTime / 1000);
        this.Print("Total time taken by this program (seconds): {0}", true, (end - start) / 1000);
        this.Print("Total bytes: {0}", true, this.totalBytes);
    }

    /// <summary>
    /// download data from the given url
    /// </summary>
    private void DownloadUrl(int index, string url)
    {
        using (WebClient client = new WebClient())
        {
            try
            {
                int start = Environment.TickCount;
                byte[] data = client.DownloadData(url);
                int end = Environment.TickCount;
                lock (lockObj)
                {
                    this.totalTime = this.totalTime + (end - start);
                    if (data != null)
                    {
                        this.totalBytes = this.totalBytes + data.Length;
                    }
                }
            }
            catch
            {
                lock (lockObj) { this.failedCount++; }
            }
            lock (lockObj)
            {
                this.completedCount++;
                if (this.completedCount % 10000 == 0)
                {
                    this.Print("Completed {0} requests.", true, this.completedCount);
                }
            }
        }
    }

    /// <summary>
    /// print usage of this program
    /// </summary>
    private void PrintUsage()
    {
        this.Print("usage: httpbench [options] <url>");
    }

    /// <summary>
    /// print exception message to console
    /// </summary>
    private void PrintError(string msg, Exception ex = null, params object[] args)
    {
        StringBuilder sb = new System.Text.StringBuilder();
        sb.Append("Error:");
        sb.AppendFormat(msg, args);
        if (ex != null)
        {
            sb.Append("Exception:");
            sb.Append(ex.Message);
        }
        this.Print(sb.ToString());
    }

    /// <summary>
    /// print to console
    /// </summary>
    private void Print(string msg, bool isLine = true, params object[] args)
    {
        if (isLine)
        {
            Console.WriteLine(msg, args);
        }
        else
        {
            Console.Write(msg, args);
        }
    }

}
}

IIS: httpbench.exe http://localhost/test

Completed 10000 requests.
Completed 20000 requests.
Completed 30000 requests.
Completed 40000 requests.
Completed 50000 requests.
Completed 60000 requests.
Completed 70000 requests.
Completed 80000 requests.
Completed 90000 requests.
Completed 100000 requests.
Total requests sent: 100000
Concurrent threads: 1000
Total completed requests: 100000
Failed requests: 0
Sum total of thread times (seconds): 97
Total time taken by this program (seconds): 16
Total bytes: 2000000

nodejs: httpbench.exe http://localhost:9090/

Completed 10000 requests.
Completed 20000 requests.
Completed 30000 requests.
Completed 40000 requests.
Completed 50000 requests.
Completed 60000 requests.
Completed 70000 requests.
Completed 80000 requests.
Completed 90000 requests.
Completed 100000 requests.
Total requests sent: 100000
Concurrent threads: 1000
Total completed requests: 100000
Failed requests: 0
Sum total of thread times (seconds): 234
Total time taken by this program (seconds): 27
Total bytes: 2000000

index.html at http://localhost:8080/test/
<p>
hello, world!
</p>

httpbench.exe http://localhost:8080/test/
Completed 10000 requests.
Completed 20000 requests.
Completed 30000 requests.
Completed 40000 requests.
Completed 50000 requests.
Completed 60000 requests.
Completed 70000 requests.
Completed 80000 requests.
Completed 90000 requests.
Completed 100000 requests.
Total requests sent: 100000
Concurrent threads: 1000
Total completed requests: 100000
Failed requests: 0
Sum total of thread times (seconds): 31
Total time taken by this program (seconds): 5
Total bytes: 2000000