using System;

using System.Globalization;

using System.Diagnostics;

public class Program

{

    public static void Main()

    {

        // 140字以下かどうかのチェックを行い超えている場合はconfigに従って動作する

        //🎶🔥é- is standard length of 6, but there are ONLY 4 characters! Why not len=4?

        //🎶🔥 are double byte UNICODE characters (> \u10000) of width or len 2 each 

        //🎶🔥é- below will replace space after lasting character '-' (position 4) with a sub using most common techniques seen online

        string s = "𠇰😈🎶🔥é-"; 

        string s2 = "𠇰😈🎶🔥é-"; 

        Stopwatch sw = new Stopwatch();

        sw.Start();

        int typicalen = s.Length;

        sw.Stop();

        Console.WriteLine("Normal String {0} len = {1} in {2} ticks.",s, typicalen, sw.ElapsedTicks.ToString("N0"));

        StringInfo stringInfoThrowAway = new StringInfo("Preload this function"); //Results vary if you move this before or after below implementations

        sw.Reset();

        sw.Start();

        StringInfo stringInfo = new StringInfo(s2);

        int stringInfoLength = stringInfo.LengthInTextElements;

        sw.Stop();

        Console.WriteLine("new StringInfo {0} len = {1} in {2} ticks.",s,stringInfoLength, sw.ElapsedTicks.ToString("N0"));

        sw.Reset();

        sw.Start();

        int[] textElemIndex = StringInfo.ParseCombiningCharacters(s);

        int tEILength = textElemIndex.Length; 

        sw.Stop();

        Console.WriteLine("ParseCombiningCharacters String {0} len = {1} in {2} ticks.",s,tEILength, sw.ElapsedTicks.ToString("N0"));

        sw.Reset();

        sw.Start();

        // Use the enumerator returned from GetTextElementEnumerator 

        // method to examine each real character.

        TextElementEnumerator charEnum = StringInfo.GetTextElementEnumerator(s);

        int i = 0;

        while (charEnum.MoveNext())

            {

                i++;   

            }

        sw.Stop();

        Console.WriteLine("GetTextElementEnumerator String {0} len = {1} in {2} ticks.",s,i, sw.ElapsedTicks.ToString("N0"));

        sw.Reset();

        sw.Start();

        char[] charsInString = s.ToCharArray();

        int charLength = charsInString.Length; 

        sw.Stop();

        Console.WriteLine("ToCharArray {0} len = {1} in {2} ticks.",s,charLength, sw.ElapsedTicks.ToString("N0"));

    }

}