What is fastest: (int), Convert.ToInt32(x) or Int32.Parse(x)?

Question

Which of the following code is fastest/best practice for converting some object x?

int myInt = (int)x;

or

int myInt = Convert.T         


        

Answer 1

this is not true. The fast conversion is direct cast:

int i = (int) stringData;

watch.Elapsed = {00:00:00.1732388}
watch2.Elapsed= {00:00:00.0878196}


 // Mesary start
                Stopwatch watch = new Stopwatch();

                watch.Start();
                for (int f = 1; f < 1000000; f++)
                {
                    item.Count = FastInt32.IntParseFast(dt.Rows[i]["TopCount"]);
                }   // Execute the task to be timed
                watch.Stop();

                Console.WriteLine("Elapsed: {0}", watch.Elapsed);
                Console.WriteLine("In milliseconds: {0}", watch.ElapsedMilliseconds);
                Console.WriteLine("In timer ticks: {0}", watch.ElapsedTicks);
                // Mesary end


                // Mesary start
                Stopwatch watch2 = new Stopwatch();

                watch2.Start();
                for (int n = 1; n < 1000000; n++)
                {
                    item.Count = (int)(dt.Rows[i]["TopCount"]);
                }   // Execute the task to be timed
                watch2.Stop();

                Console.WriteLine("Elapsed: {0}", watch2.Elapsed);
                Console.WriteLine("In milliseconds: {0}", watch2.ElapsedMilliseconds);
                Console.WriteLine("In timer ticks: {0}", watch2.ElapsedTicks);
                // Mesary end