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[Jaroslav Hajek]

2009/4/17 MHELHEFNY <mhelhefny at gmail.com>:
> excution of the following line on both octave-3.0.2 and octave-3.0.3 on my
> windows old machine:
>
> a=rand(1000);tic;b=inv(inv(a));toc,
>
> the times was  5.406 seconds for octave-3.0.2,
> and                27.181 seconds for octave-3.0.3,
> what happend?.
> thanks in advance
> mhelhefny

in this expression essentially all the work is done by BLAS/LAPACK libs.
maybe your two versions use different libraries.

-- 
RNDr. Jaroslav Hajek
computing expert & GNU Octave developer
Aeronautical Research and Test Institute (VZLU)
Prague, Czech Republic
url: www.highegg.matfyz.cz