[Mono-dev] ToString() performace in Mono

[Petit Eric]

2007/11/22, pablosantosluac <pablosantosluac at terra.es>:
> Hi,
>
> Ok, but I'm not doing string "concat" but just converting to string, and
> using StringBuilder in this scenario, it isn't faster, as you have just
> pointed to...
yes complety right, but the first idea was about the fact for string
performance, stringbuilder is fastest, but aparently not at the
instance time, only to append a long text.
oki
now we are fixed lol
>
> My point is that ToString is about 3 times slower in Mono than its .NET
> counterpart. We'll try to get rid of it as much as we can, but some
> optimization would be really great.
>
> Thanks,
>
> pablo
>
>
> ----- Original Message -----
> From: "Petit Eric" <surfzoid at gmail.com>
> To: "pablosantosluac" <pablosantosluac at terra.es>
> Cc: <mono-devel-list at lists.ximian.com>
> Sent: Thursday, November 22, 2007 11:56 AM
> Subject: Re: [Mono-dev] ToString() performace in Mono
>
>
> > Windows and String
> > val is 5999999 and time 4391
> >
> > Windows and StringBuilder
> > val is 5999999 and time 5688
> >
> > Code For StringBuilder :
> >
> > using System;
> > using System.Collections.Generic;
> > using System.Text;
> >
> > namespace compareCompare
> > {
> >    class Program
> >    {
> >        static void Main(string[] args)
> >        {
> >            int ini = Environment.TickCount;
> >
> >            System.Text.StringBuilder k = new System.Text.StringBuilder();
> >
> >            for (int i = 0; i < 6000000; ++i)
> >            {
> >                k = new System.Text.StringBuilder(i.ToString());
> >            }
> >
> >            Console.WriteLine("val is {0} and time {1}", k,
> > Environment.TickCount - ini);
> >
> >            while (true)
> >            {
> >                if (Console.ReadKey() != null) break;
> >            }
> >
> >        }
> >    }
> > }
> >
> >
> >
> >
> > 2007/11/22, pablosantosluac <pablosantosluac at terra.es>:
> >> Anyway, how would you use it in the sample I attached to improve
> >> performance? I need to convert a different integer each pass...
> >> ----- Original Message -----
> >> From: "Petit Eric" <surfzoid at gmail.com>
> >> To: "pablosantosluac" <pablosantosluac at terra.es>
> >> Cc: <mono-devel-list at lists.ximian.com>
> >> Sent: Thursday, November 22, 2007 10:24 AM
> >> Subject: Re: [Mono-dev] ToString() performace in Mono
> >>
> >>
> >> > Do you try to replace String by a System.Text.StringBuilder ?
> >> >
> >> > 2007/11/22, pablosantosluac <pablosantosluac at terra.es>:
> >> >> Hi,
> >> >>
> >> >>
> >> >> I've detected a performance hit on "plastic server" running on mono. I
> >> >> was
> >> >> actually shocked because when I checked something similar working with
> >> >> integers, Mono was actually faster than .NET. But it seems it is not
> >> >> the
> >> >> case with strings.
> >> >>
> >> >> Please consider the following code sample:
> >> >>
> >> >>
> >> >> using System;
> >> >>
> >> >> namespace compareCompare
> >> >> {
> >> >>     class Class1
> >> >>     {
> >> >>         static void Main(string[] args)
> >> >>         {
> >> >>             int ini = Environment.TickCount;
> >> >>
> >> >>             string k = string.Empty;
> >> >>
> >> >>             for( int i = 0; i < 6000000; ++i )
> >> >>             {
> >> >>                 k = i.ToString();
> >> >>             }
> >> >>
> >> >>             Console.WriteLine("val is {0} and time {1}", k,
> >> >> Environment.TickCount - ini);
> >> >>         }
> >> >>     }
> >> >> }
> >> >>
> >> >>
> >> >> And the following results:
> >> >>
> >> >> >compareCompare.exe
> >> >> val is 5999999 and time 3525
> >> >>
> >> >> >"c:\Archivos de programa\Mono-1.2.5.2\bin\mono.exe"
> >> >> >compareCompare.exe
> >> >> val is 5999999 and time 11577
> >> >>
> >> >>
> >> >> Thanks,
> >> >>
> >> >>
> >> >> pablo
> >> >>
> >> >> _______________________________________________
> >> >> Mono-devel-list mailing list
> >> >> Mono-devel-list at lists.ximian.com
> >> >> http://lists.ximian.com/mailman/listinfo/mono-devel-list
> >> >>
> >>
> >>
>
>