Question

Who work faster IndexOf char or IndexOf string in C#

Answer 1

using System;
using System.Diagnostics;

namespace ConsoleApplication_C_Sharp
{
    class Program
    {
        public int Length { get; private set; }

        static void Main(string[] args)
        {
            string s = "c#:java:c++:php";

            var sw1 = Stopwatch.StartNew();
            for (int i = 0; i < 1000000; i++)
            {
                int result = s.IndexOf('a');
            }
            sw1.Stop();

            var sw2 = Stopwatch.StartNew();
            for (int i = 0; i < 1000000; i++)
            {
                int result = s.IndexOf("a");
            }
            sw2.Stop();

            Console.WriteLine("IndexOf char: " + sw1.Elapsed.TotalMilliseconds + " ms");
            Console.WriteLine("IndexOf string: " + sw2.Elapsed.TotalMilliseconds + " ms");

        }
    }
}


/*
run:
      
IndexOf char: 7.9205 ms
IndexOf string: 94.5907 ms

*/

 

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