Testing UUID creation speed

gistfile1.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Text;

class Program {
	const int NumRuns = 1000000;
	const int UUIDLength = 16;
	static Random rng = new Random();
	static Encoding encoding = System.Text.Encoding.GetEncoding("iso-8859-1");
	static Dictionary<String, String> dict = new Dictionary<String, String>();

	static void Main() {
		Stopwatch stopwatch = new Stopwatch();
		stopwatch.Start();
		for (var i = 0; i < NumRuns; i += 1) {
			var uuid = CreateUUID();
			if (!dict.ContainsKey(uuid)) {
				dict.Add(uuid, uuid);
			}
		}
		stopwatch.Stop();
		Console.Out.WriteLine(stopwatch.Elapsed.TotalMilliseconds);
	}

	static string CreateUUID() {
		byte[] bytes = new byte[UUIDLength];
		rnd.NextBytes(bytes);
		return encoding.GetString(bytes);
	}
}