Re: Using memcpy or memmove instead of for loop in liboctave/array/dim-vector.h

[c.]

On 9 Nov 2013, at 04:57, PrasannaKumar Muralidharan <address@hidden> wrote:

> Hi Octave maintainers,
> 
> In liboctave/array/dim-vector.h clonerep and resizerep functions are
> defined. They use for loop for copying data. Is it possible to use
> memcpy or memmove instead? The mem* function may be faster than for
> loop as its implementation can use SIMD instructions when possible.
> 
> Will it be useful or does it make sense?
> 
> Thanks and Regards,
> PrasannaKumar

I doubt this would make a huge difference in performance for any application
 as dim_vector objects have the size of the number of dimensions in an array, 
which is usually a small number.

If you really want to do this change, it sounds like a good exercise in Octave 
development, so go ahead and prepare a changeset as suggested by Dan if you 
like 
to.

I personally think it would look cleaner to use C++ style functions like
std::copy and std::move rather than the C equivalents, though.

I don't see an rule about this in the coding standard, is there a preference
for using either C or C++ standard library functions?

c.