Auslesen und splitten von Strings verschnellern?

Code:
using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Text.RegularExpressions;

using System.Threading.Tasks;

using System.Collections;

using System.Net;

using System.IO;



namespace DeviantLinker

{

    class Program

    {

        protected List<string> _urlList = new List<string>();



        static void Main(string[] args)

        {

            Program self = new Program();

            self.run();

        }



        public void run()

        {

            while (this._printMenu() != 0)

            {

                Console.WriteLine("Processing URLs...");

                Console.WriteLine("");



                foreach (string url in this._urlList)

                {

                    this._processUrl(url);

                }



                this._urlList.Clear();



                Console.WriteLine("");

                Console.WriteLine("");

            }



            Console.WriteLine("Exiting");

        }



        protected bool _isUrl(string url)

        {

            Uri result;

            Regex regexpDeviantCheck = new Regex("\\.deviantart\\.net", RegexOptions.Compiled | RegexOptions.IgnoreCase);

            

            if (Uri.TryCreate(url, UriKind.Absolute, out result))

            {

                return regexpDeviantCheck.IsMatch(url);

            }



            return false;

        }



        protected string _getTitle(string url)

        {

            byte[] buf = new byte[8192];

            string siteCode = "";

            WebRequest request = WebRequest.Create(url);

            WebResponse response = request.GetResponse();

            Stream resStream = response.GetResponseStream();

            Regex regexObj = new Regex("<title>(.*) by (.*?)</title>", RegexOptions.Compiled | RegexOptions.IgnoreCase);



            string tempString = null;

            int count = 0;



            do

            {

                count = resStream.Read(buf, 0, buf.Length);



                if (count != 0)

                {

                    tempString = Encoding.ASCII.GetString(buf, 0, count);

                    siteCode += tempString;



                    if (regexObj.IsMatch(siteCode))

                    {

                        return regexObj.Match(siteCode).Groups[1].Value;

                    }

                }

            }

            while (count > 0);



            return "";

        }



        protected void _processUrl(string url)

        {

            Regex regexObj = new Regex(@"http://(.*)/(.*?)_by_(.*?)-(.*?)\.(.*)", RegexOptions.Compiled | RegexOptions.IgnoreCase);

            Match matches = regexObj.Match(url);



            string autor = matches.Groups[3].Value;

            string id = matches.Groups[4].Value;

            string link = "http://fav.me/" + id;



            string code = "[spoiler=" + this._getTitle(link) + "]\n";

            code += "[img]" + url + "[/img]\n";

            code += "[url=" + link + "]Source[/url]\n";

            code += "By [url=http://" + autor + ".deviantart.com]" + autor + "[/url]\n";

            code += "[/spoiler]";



            Console.WriteLine(code);



            // Sleep a second cause we won't get locked out of deviantart

            System.Threading.Thread.Sleep(1000);

        }



        protected int _printMenu()

        {

            string input;



            Console.WriteLine("DeviantArt URL to Bronies.de Converter");

            Console.WriteLine("======================================");

            Console.WriteLine("");

            Console.WriteLine("Enter a valid DeviantArt URL or any of the following numbers.");

            Console.WriteLine("(1) Convert the given URLs to Bronies.de BBCode");

            Console.WriteLine("(2) Clear the already given URLs");

            Console.WriteLine("(X) Exit the program");



            while (true)

            {

                Console.WriteLine("->");

                input = Console.ReadLine();



                // Exit the program

                if (input.Equals("x", StringComparison.OrdinalIgnoreCase))

                {

                    return 0;

                }

                

                // Convert the URLs

                if (input.Equals("1", StringComparison.OrdinalIgnoreCase))

                {

                    return 1;

                }



                // Clear the list

                if (input.Equals("2", StringComparison.OrdinalIgnoreCase))

                {

                    this._urlList.Clear();

                }



                // This must be an URL

                if (input.Length > 0)

                {

                    if (this._isUrl(input))

                    {

                        this._urlList.Add(input);

                        Console.WriteLine("OK");

                    }

                    else

                    {

                        Console.WriteLine("Not an URL!");

                    }

                }

            }

        }

    }

}