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Ublas :

From: Dave Steffen (dgsteffen_at_[hidden])
Date: 2006-08-01 15:28:24

Gunter Winkler writes:
> John Maddock schrieb:
> > emijah_s_at_[hidden] wrote:
> >
> >> Could you please elaborate on the last part? We are using uBlas for a
> >> robotics application and the typical size of a matrix tends to be
> >> pretty small(around 6x6 typical, 35x35 maximum). So it doesn't really
> >> make sense to use atlas which tends to be effective for large
> >> matrices.
> >>
> >
> > I wonder have you looked at MTL ? It's optimised for small matices and
> > known to be very fast in this case:
> >
> this is only partially true. The performance of small MTL matrices was
> quite bad until someone wrote short and lean specializations for small
> matrix/vector products. I can give more details (and the files) if
> someone is interested. The specializations for a given size were created
> by a python script.

 Tvmet is also worth a look, if you're looking around; explicitly
 build for small problems ("tiny vector matrix expression template",
 or some such) and it's extremely fast, according to my profiling.

Dave Steffen, Ph.D.
Software Engineer IV Disobey this command!
Numerica Corporation
ph (970) 419-8343 x27
fax (970) 223-6797 - Douglas Hofstadter
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