On Sat, 29 Nov 2008 16:04:54 +0100
Miguel Angel Marchuet <[EMAIL PROTECTED]> wrote:
> I think it's a little dangerous to use hard coded size of HB_ITEM
It's not a little, but VERY dangerous but written especially for 8 byte
alignment ;-)
BTW, many times ago it was said that an alignment of 4 is the best for
BCC (-a4 flag). But I still cannot prove it on real application. In my
case, using -a4 is much slower than -a8 although theoritically, -a4
should be faster.
Have you any comment on this matter?
--
Andi
> #ifndef __GNUC__
> _asm {
> mov edi, pDest;
> mov esi, pSource;
> mov ecx, 6; /* sizeof( HB_ITEM ) = 24 bytes / 4 = 6 */
> rep movsd;
> }
> #else
> memcpy( pDest, pSource, sizeof( HB_ITEM ) );
> #endif
>
> is possible it changes, for example using -a4 or -a8 alignment parameter
> at BCC compiler
>
> Best regards
> Miguel Angel Marchuet
>
> Andi Jahja escribió:
> > Hi Toninho,
> >
> > In my test, MSVC9 is a lot faster than BCC 6.10.
> >
> > BTW, can you please make a test as follows:
> >
> > 1. Run speedtst.exe with standard CVS fastitem.c
> > 2. Replace fastitem.c with the attached one and
> > compare the speed.
> >
> > If you like the speed with the hacked fastitem.c, you may use it.
> > I've been using it since many years ago with no problem.
> > --
> > Andi
> >
> > On Fri, 28 Nov 2008 13:27:35 -0300
> > "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote:
> >
> >
> >>> What I use:
> >>>
> >>> Based on several considerations, I am now using MSVS 9.0 as my work
> >>> horse,
> >>> although the compiling speed is very slow compared to BCC 5.5.1.
> >>> MSVS 9.0 (Express) is free, code speed is excellent, support/continuity
> >>> is
> >>> more or less obvious.
> >>>
> >> Thanks for tests Andi.
> >>
> >> Do you have results for speedtest between bcc6.10 and msvc9. Wich is
> >> better please?
> >>
> >> Regards,
> >>
> >> Toninho.
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