using System;
using System.Diagnostics;
using System.Text;
using System.Threading;

namespace TestConsole
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            StringFormatTest();
        }

        private static void StringBuilderTest()
        {
            int numIterations = 100000; // number of iterations to run
            int maxConcats = 15;
            string strVal = "01234567890";
            // string strVal = "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890";
            //string strVal = "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890"
            //                + "01234567890012345678900123456789001234567890012345678900123456789001234567890012345678900123456789001234567890";

            Thread.CurrentThread.Priority = ThreadPriority.Highest;

            Console.WriteLine("Traditional + concatenation");
            for (int numConcats = 1; numConcats <= maxConcats; numConcats++)
            {
                Stopwatch w = new Stopwatch();
                w.Start();

                for (int iter = 0; iter < numIterations; iter++)
                {
                    string s = strVal;
                    for (int k = 0; k < numConcats; k++)
                    {
                        s = s + strVal;
                    }
                }

                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            Console.WriteLine("StringBuilder()");
            for (int numConcats = 1; numConcats <= maxConcats; numConcats++)
            {
                Stopwatch w = new Stopwatch();
                w.Start();

                for (int iter = 0; iter < numIterations; iter++)
                {
                    StringBuilder s = new StringBuilder(strVal);
                    for (int k = 0; k < numConcats; k++)
                    {
                        s.Append(strVal);
                    }
                }

                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            Console.WriteLine("StringBuilder(full capacity)");
            for (int numConcats = 1; numConcats <= maxConcats; numConcats++)
            {
                Stopwatch w = new Stopwatch();
                w.Start();

                for (int iter = 0; iter < numIterations; iter++)
                {
                    StringBuilder s = new StringBuilder(strVal, strVal.Length*(1 + numConcats));

                    for (int k = 0; k < numConcats; k++)
                    {
                        s.Append(strVal);
                    }
                }

                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);

                Thread.CurrentThread.Priority = ThreadPriority.Normal;
            }

            //Console.WriteLine("StringBuilder(full capacity * 2)");
            //for (int numConcats = 1; numConcats <= maxConcats; numConcats++)
            //{
            //    Stopwatch w = new Stopwatch();
            //    w.Start();

            //    for (int iter = 0; iter < numIterations; iter++)
            //    {
            //        StringBuilder s = new StringBuilder(strVal, (int) (strVal.Length*(1 + numConcats)*2));

            //        for (int k = 0; k < numConcats; k++)
            //        {
            //            s.Append(strVal);
            //        }
            //    }

            //    w.Stop();
            //    Console.WriteLine(" {0}", w.ElapsedMilliseconds);

            //    Thread.CurrentThread.Priority = ThreadPriority.Normal;
            //}

            //Console.WriteLine("StringBuilder(full capacity / 2)");
            //for (int numConcats = 1; numConcats <= maxConcats; numConcats++)
            //{
            //    Stopwatch w = new Stopwatch();
            //    w.Start();

            //    for (int iter = 0; iter < numIterations; iter++)
            //    {
            //        StringBuilder s = new StringBuilder(strVal, (int) (strVal.Length*(1 + numConcats)/2));

            //        for (int k = 0; k < numConcats; k++)
            //        {
            //            s.Append(strVal);
            //        }
            //    }

            //    w.Stop();
            //    Console.WriteLine(" {0}", w.ElapsedMilliseconds);

            //    Thread.CurrentThread.Priority = ThreadPriority.Normal;
            //}
        }

        private static void StringConcatTest()
        {
            {
                string s = "a" + "b" + "c";
            }
            {
                string s = string.Concat("a", "b", "c");
            }
            {
                string s = "a";
                s = s + "b";
                s = s + "c";
            }

            int numIterations = 100000; // number of iterations to run
            Thread.CurrentThread.Priority = ThreadPriority.Highest;
            string strValue = "0123456789";

            {
                Console.WriteLine("+ concatenation");
                Stopwatch w = new Stopwatch();

                w.Start();
                for (int iter = 0; iter < numIterations; iter++)
                {
                    string s = strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue
                        + strValue;
                }
                w.Stop();

                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            {
                Console.WriteLine("string.Concat concatenation");
                Stopwatch w = new Stopwatch();

                w.Start();
                for (int iter = 0; iter < numIterations; iter++)
                {
                    string s = string.Concat(strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue
                        , strValue);                    
                }
                w.Stop();

                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            Thread.CurrentThread.Priority = ThreadPriority.Normal;
        }

        private static void StringFormatTest()
        {
            int numIterations = 100000; // number of iterations to run
            Thread.CurrentThread.Priority = ThreadPriority.Highest;
            string strVal = "0123456789";
            {
                Console.WriteLine("+ concatenation");
                Stopwatch w = new Stopwatch();
                w.Start();
                for (int iter = 0; iter < numIterations; iter++)
                {
                    // code being measured:
                    string s = string.Format("Value: {0}", strVal);
                }
                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            {
                Console.WriteLine("string.Concat concatenation");
                Stopwatch w = new Stopwatch();
                w.Start();
                for (int iter = 0; iter < numIterations; iter++)
                {
                    // code being measured
                    string s = "Value: " + strVal;
                }
                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            {
                Console.WriteLine("+ concatenation");
                Stopwatch w = new Stopwatch();
                w.Start();
                for (int iter = 0; iter < numIterations; iter++)
                {
                    // code being measured:
                    StringBuilder s = new StringBuilder();
                    s.AppendFormat("Value: {0}", strVal);
                }
                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            {
                Console.WriteLine("string.Concat concatenation");
                Stopwatch w = new Stopwatch();
                w.Start();
                for (int iter = 0; iter < numIterations; iter++)
                {
                    StringBuilder s = new StringBuilder();
                    s.Append("Value: " + strVal);
                }
                w.Stop();
                Console.WriteLine(" {0}", w.ElapsedMilliseconds);
            }

            Thread.CurrentThread.Priority = ThreadPriority.Normal;
        }        
}

}