Date: Apr 8, 2013 3:28 AM
Subject: Re: performance of parfor
"Steven_Lord" <email@example.com> wrote in message <firstname.lastname@example.org>...
> "kinor " <email@example.com> wrote in message
> > Edric M Ellis <firstname.lastname@example.org> wrote in message
> > <email@example.com>...
> >> "kinor " <firstname.lastname@example.org> writes:
> > I looked in the help of rank, its multithreading is not mentioned there,
> > where did you know that?
> Technically the RANK function itself is not multithreaded, as it is a MATLAB
> function file and it doesn't use any of the parallel constructs like PARFOR
> or SPMD from Parallel Computing Toolbox.
> However, most of the time required to compute RANK is used by computation of
> the singular values of the input matrix using SVD, and SVD _is_
> multithreaded (under certain conditions, notably when the data is large
> I'd say that's close enough to count Edric's statement as correct.
> Steve Lord
> To contact Technical Support use the Contact Us link on
thanks a lot for the enlighting comment, I did not doubt Erics comment. I was just surprised.
thanks again Eric.
any idea why the last example i posted is not faster with parfor?