Hi Todd, A Diumenge 17 Octubre 2004 03:50, Todd Miller va escriure:
I don't think numarray dot() will pick up any boost at all from ATLAS because it's not written to do it. Besides that, there are two performance problems I know of with numarray's dot() which may dominate or dilute any ATLAS benefits:
1. dot() requires array creation.
Yes, but my guess is that for large arrays, this time should be negligible compared with the multiplication time.
2. dot() requires array copies.
Mmm, you mean even for well-behaved arrays? Sorry, but I don't understand why. May I ask if there is any plan to complete a better integration of external LAPACK libraries in numarray or this is considered low priority? Never mind, I don't need this functionality right now. It's just that I'm preparing a series of 'hands-on' sessions about Python and Scientific Computing, and I was trying to understand the current advantages and limitations of numarray compared with NumPy. Cheers, -- Francesc Alted