[SciPy-user] Compile scipy from SVN on OS X: no clapack ?

[David Cournapeau]

Pierre GM wrote:
> All,
> I'm working on a piece of code that requires numerous calls to  
> scipy.linalg.eigvals. I was surprised by the slowness of the code, so  
> I figured I'd check whether my installation of scipy was correct.
>   

When you said surprised by the slowness, is it comparatively to scipy on
another OS on the same/comparable machine ?

> Turns out it's probably not: running the tests, I end up w/ some  
> messages indicating that clapack is empty. That never really mattered  
> until now...
>   

Accelerate does not have a clapack interface, IIRC. It should not matter
much if you have an accelerated lapack - maybe the different you could
see, assuming it is faster on linux, is due to atlas having an optimized
version on Linux but not on mac os x (Accelerate mostly use atlas, I
believe - and atlas recently included more optimized lapack functions).

cheers,

David