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From: "Steven Lord" <slord@mathworks.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: size(sparse matrix) > size(full matrix)
Date: Fri, 18 Sep 2009 09:30:43 -0400
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"Derek O'Connor" <derekroconnor@eircom.net> wrote in message 
news:h901lh$as$1@fred.mathworks.com...

*snip*

> Why is R2009b so fast on x=sparse(A)\b? Has the built-in sparse matrix 
> package been changed from previous versions? Can you tell us how this 
> speed-up has been achieved?

We've made some improvements to sparse rectangular MLDIVIDE (including 
multithreading for sufficiently large matrices) as described in the release 
notes:

http://www.mathworks.com/access/helpdesk/help/techdoc/rn/br5k34y-1.html

-- 
Steve Lord
slord@mathworks.com
comp.soft-sys.matlab (CSSM) FAQ: http://matlabwiki.mathworks.com/MATLAB_FAQ