Re: [ublas] new fixed size matrix class

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: http://osl.iu.edu/research/mtl/
 > >   
 > 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.

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Dave Steffen, Ph.D.      
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Numerica Corporation
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dgsteffen_at_[hidden]
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