Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.programming.threads > #2420

Re: About scimark2 ...

Cross-posted to 2 groups.

Show all headers | View raw

On Fri, 06 Jun 2014 05:42:19 -0700
aminer <aminer@toto.net> wrote:

> On 6/6/2014 2:04 PM, Melzzzzz wrote:
> > On Fri, 06 Jun 2014 04:22:25 -0700
> > aminer <aminer@toto.net> wrote:
> >
> >> Hello,
> >>
> >> Look at the following scimark2 benchmark:
> >>
> >> http://delphihaters.blogspot.ca/2011/03/scimark2-and-delphi.html
> >>
> >>
> >> You will notice that Delphi is almost 2x times slower than
> >> than C on theis scimark2 benchmark...
> >>
> >> And you will notice that the poeple on this webpage don't seem
> >> to understand that the big difference of speed between Delphi
> >> and C comes from the fact that the C and C++ compilers uses
> >> "auto-vectorization" , this "auto-vectorization" allows
> >> the C and C++ scimark2 programs to use SIMD instructions such as
> >> SSE2,
> >
> > Have you tried on some other architecture besides x86?
> >
> >
> >
> 
> 
> 
> I have benchmarked Delphi and FreePascal against GCC C++
> and Microsoft C+ on scimark2, and i have found that without the GCC
> -Ox optimization options the auto-vectorization will not be enabled
> so Delphi and FreePascal and GCC C++ scored the same speed on
> scimark2, but when you give -O1 or -O2,  GCC C++ uses
> auto-vectorization and it scores almost 2X times the speed of
> Freepascal or Delphi on scimark2 on x86.
> 
> 
Haahahhahahh. No, you try -m32 (x64 requires sse2) and -O2 with -mno-sse
-mno-sse2.
Without -O is actually without optimisations at all ;)
I think that this particular benchmark does not use auto vectorization
much ;)


> Thank you,
> Amine Moulay Ramdane.
> 
> 
> 
> 
> 
> 



-- 
Click OK to continue...

Back to comp.programming.threads | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

About scimark2 ... aminer <aminer@toto.net> - 2014-06-06 04:22 -0700
  Re: About scimark2 ... aminer <aminer@toto.net> - 2014-06-06 04:50 -0700
  Re: About scimark2 ... aminer <aminer@toto.net> - 2014-06-06 04:57 -0700
  Re: About scimark2 ... Melzzzzz <mel@zzzzz.invalid> - 2014-06-06 23:04 +0200
    Re: About scimark2 ... aminer <aminer@toto.net> - 2014-06-06 05:22 -0700
    Re: About scimark2 ... aminer <aminer@toto.net> - 2014-06-06 05:42 -0700
      Re: About scimark2 ... Melzzzzz <mel@zzzzz.com> - 2014-06-07 00:56 +0200
      Re: About scimark2 ... Kaz Kylheku <kaz@kylheku.com> - 2014-06-06 23:11 +0000
        Re: About scimark2 ... Melzzzzz <mel@zzzzz.invalid> - 2014-06-07 01:58 +0200
          Re: About scimark2 ... aminer <aminer@toto.net> - 2014-06-06 09:08 -0700
            Re: About scimark2 ... Melzzzzz <mel@zzzzz.invalid> - 2014-06-07 04:44 +0200

csiph-web