Re: [ublas] Performance with SSE2

From: Preben Hagh Strunge Holm (preben_at_[hidden])
Date: 2007-03-12 13:15:47

> It is.  The implementation, however, is not necessarily focused on 
> efficiency (more on correctness).   In my experience if your code only 
> uses vector operations (level 1 blas) and your vectors are not extremely 
> large then there isn't much of a performance gain from linking to a 
> tuned library like atlas or acml.  For Level 2/3 blas operations and 
> matrices larger than say 30x30 using a library that takes the cache and 
> architecture into account makes a large difference.

Okay, I use 72x72 matrices and vectors of the size 72. So it might be 
beneficial to use atlas-blas then!