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630 bytes added ,  03:48, 25 June 2014
*sparse matrix tricks
*tricks relying on fortran indexing
===Changing BLAS===
Many Octave functions are wrappers to optimized numerical libraries, notably BLAS and ATLAS. It is possible to achieve impressive performance gain by simply using a library tuned to your platform. One example is using OpenBLAS to replace the default BLAS implementation ([ further details]).
On Linux, this just takes a few commands:
sudo apt-get install libopenblas-base libatlas3gf-base
Then run
sudo update-alternatives --config
and select the openblas option.
====Other references====
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