Any performance difference between int.Parse() and Convert.Toint()?

Question

Is there any significant advantages for converting a string to an integer value between int.Parse() and Convert.ToInt32() ?

string stringInt = \"01234\";

i         


        

Answer 1

For what its worth:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            int iterations = 1000000;
            string val = "01234";

            Console.Write("Run 1: int.Parse() ");
            DateTime start = DateTime.Now;
            DoParse(iterations, val);
            TimeSpan duration = DateTime.Now - start;
            Console.WriteLine("Duration: " + duration.TotalMilliseconds.ToString() + "ms");

            Console.Write("Run 1: Convert.ToInt32() ");
            start = DateTime.Now;
            DoConvert(iterations, val);
            duration = DateTime.Now - start;
            Console.WriteLine("Duration: " + duration.TotalMilliseconds.ToString() + "ms");

            Console.Write("Run 2: int.Parse() ");
            start = DateTime.Now;
            DoParse(iterations, val);
            duration = DateTime.Now - start;
            Console.WriteLine("Duration: " + duration.TotalMilliseconds.ToString() + "ms");

            Console.Write("Run 2: Convert.ToInt32() ");
            start = DateTime.Now;
            DoConvert(iterations, val);
            duration = DateTime.Now - start;
            Console.WriteLine("Duration: " + duration.TotalMilliseconds.ToString() + "ms");

            Console.Write("Run 3: int.Parse() ");
            start = DateTime.Now;
            DoParse(iterations, val);
            duration = DateTime.Now - start;
            Console.WriteLine("Duration: " + duration.TotalMilliseconds.ToString() + "ms");

            Console.Write("Run 3: Convert.ToInt32() ");
            start = DateTime.Now;
            DoConvert(iterations, val);
            duration = DateTime.Now - start;
            Console.WriteLine("Duration: " + duration.TotalMilliseconds.ToString() + "ms");

            Console.ReadKey();
        }

        static void DoParse(int iterations, string val)
        {
            int x;
            for (int i = 0; i < iterations; i++)
            {
                x = int.Parse(val);
            }
        }

        static void DoConvert(int iterations, string val)
        {
            int x;
            for (int i = 0; i < iterations; i++)
            {
                x = Convert.ToInt32(val);
            }
        }

    }
}

Result of 1,000,000 iterations of each:

Run 1: int.Parse() Duration: 312.5ms
Run 1: Convert.ToInt32() Duration: 328.125ms
Run 2: int.Parse() Duration: 296.875ms
Run 2: Convert.ToInt32() Duration: 312.5ms
Run 3: int.Parse() Duration: 312.5ms
Run 3: Convert.ToInt32() Duration: 312.5ms