A peek past lambda

[Llewellyn Falco]

sorry, when I reformated my code, resharper changed the middle line,
it originally was
number = IntegerUtils.increment(number);

On Sun, Aug 21, 2011 at 11:08 AM, Llewellyn Falco <isidore at setgame.com> wrote:
>> linq = C# extension method + lambda, both are slow.
>> cheers,
>> Rémi
>
> Again, I am curious about your profiling to achieve these results, I
> just ran the following code and got:
> Counting to 1000000 took 00:00:00.0156247 with regular methods
> Counting to 1000000 took 00:00:00.0156247 with statically called
> extension methods
> Counting to 1000000 took 00:00:00 with extension methods
>
> To be fair, I think these are all so damn fast that the margin of
> error is > than the total time it takes to run the method 1,000,000
> times,
> but it definitely doesn't support your claim that "extension methods are slow"
>
> here's the code:
>
> public class SpeedTest
>        {
>                public int increment(int i)
>                {
>                        return i + 1;
>                }
>
>                [Test]
>                public void TestSideHasDistance()
>                {
>                        int times = 1000000;
>                        DateTime start = DateTime.Now;
>                        int number = 0;
>                        for (int i = 0; i < times; i++)
>                        {
>                                number = increment(number);
>                        }
>                        TimeSpan time = DateTime.Now - start;
>                        Console.WriteLine("Counting to {0} took {1} with regular
> methods".FormatWith(number, time));
>                        start = DateTime.Now;
>                        number = 0;
>                        for (int i = 0; i < times; i++)
>                        {
>                                number = number.increment();
>                        }
>                        time = DateTime.Now - start;
>                        Console.WriteLine("Counting to {0} took {1} with statically called
> extension methods".FormatWith(number,
>
>                             time));
>                        start = DateTime.Now;
>                        number = 0;
>                        for (int i = 0; i < times; i++)
>                        {
>                                number = number.increment();
>                        }
>                        time = DateTime.Now - start;
>                        Console.WriteLine("Counting to {0} took {1} with extension
> methods".FormatWith(number, time));
>                }
>        }
>
>        public static class IntegerUtils
>        {
>                public static int increment(this int i)
>                {
>                        return i + 1;
>                }
>
>                public static int incrementWithExtension(int i)
>                {
>                        return i + 1;
>                }
>        }
>
>
>
> Llewellyn Falco
> www.approvaltests.com
>



-- 
Llewellyn Falco
www.approvaltests.com