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From: Hari Sundar (hsundar_at_[hidden])
Date: 2006-03-27 13:33:00

I understand ...

When I meant it is very slow .. it is slow because it is doing a lot of
number crunching .. and I want to speed it up as much as possible. I have
already manually unrolled the loops within the function being called and now
was trying to get rid of the additional cost of the virtual function call
... The Barton-Nackman trick seems to work ... as Simon suggested. If there
is something more I can do .. please let me know.

thanks for all the suggestions,
~Hari

On 3/27/06, Paul Beardsley <pab_at_[hidden]> wrote:
>
> Also have you verified that the slow performance is due to the virtual
> function call? In general, this is not an area that you can target and
> expect to get big gains. You said that your program is 'very slow'.
> If you want to speed it up by an order of magnitude, you probably won't
> be in luck just attacking the virtual function call,
>
> Paul.
>
> Simon Perreault wrote:
> > On Sunday 26 March 2006 22:53, Hari Sundar wrote:
> >
> >> Do people have any experience with this kind of stuff ? what would be
> the
> >> best way to do something like this ... where the data is stored within
> the
> >> parent class and the derived classes are mainly providing different
> >> functions that process this data differently.
> >>
> >
> > Can't you just use the Barton-Nackman trick? Make the data protected in
> the
> > parent so that the children can access it. Or am I missing something?
> > _______________________________________________
> > oon-list mailing list
> > oon-list_at_[hidden]
> > http://www.oonumerics.org/mailman/listinfo.cgi/oon-list
> >
>
>
> --
> Paul Beardsley, Senior Research Scientist
> MERL, 201 Broadway, Cambridge, MA 02139, USA
> tel: +(617) 621 7569
> fax: +(617) 621 7550
>
>
> 

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