using System;

using System.Linq;

using System.Text.RegularExpressions;

using System.Diagnostics;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var values = Enumerable.Range(1, 10000)

            .Select(x=>"Value1-"+x)

            .Concat(Enumerable.Range(1, 10000).Select(x=>"Value1"+x + "+"))

            .Concat(Enumerable.Range(1, 10000).Select(x=>"+Value1"+x + "+"))

            .Concat(Enumerable.Range(1, 10000).Select(x=>"Vlaue1ä"+x + "+"))

​

            .ToArray();

        var sw = new Stopwatch();

        int ok = 0, failed = 0;

        for (int i = 0; i<10; i++){     

            sw.Start();

            ok = 0; failed = 0;

            foreach (var value in values){

                if(RegexMatch(value)){

                    ok++;

                }

                else{

                    failed++;

                }

            }

            sw.Stop();

            Console.WriteLine(i + " Regex ({0}/{1}/{2}): {3}", ok, failed, values.Length, sw.Elapsed);

        }

​

        for (int i = 0; i<10; i++){ 

            sw.Restart();

            ok=0; failed=0;

            foreach (var value in values){

                if(Match(value)){

                    ok++;

                }

                else{

                    failed++;

                }

            }

            sw.Stop();

            Console.WriteLine(i + " Regular ({0}/{1}/{2}): {3}", ok, failed, values.Length, sw.Elapsed);

        }

    }

    static Regex rgAlphaNumOrHyphen = new Regex("^[a-zA-Z0-9-]+$", RegexOptions.Compiled | RegexOptions.Singleline | RegexOptions.ExplicitCapture);

    public static bool RegexMatch(string value){

        return rgAlphaNumOrHyphen.IsMatch(value);

    }

    public static bool Match(string value){

        if(value.Length==0){return true;}

        for (int i = 0, count = value.Length; i<count; i++){

            var c = value[i];

            if (c>='a' && c<='z'){continue; }

            if (c>='A' && c<='Z'){continue;}

            if (c>='0' && c<='9'){continue;}

            if (c!='-'){continue;}

            return true;

        }

        return false;

    }

}