[Octave-bug-tracker] [bug #41453] norm is really slow for sparse matrices

[Massimiliano Fasi]

Follow-up Comment #16, bug #41453 (project octave):

I have submitted a new version of the patch. It uses a function defined in
eigs_base.cc to compute just one eigenvalue and it's indeed much faster than
before, even faster than norm (full (A)). The preformances are now comparable
with the ones of svd(A, 1) that remains a little bit faster (some experiments
soon).

There are still some problems that should be adressed, in particular:

* the fact that I am including a .cc file.

* the use of a complex functions even if the input matrix is real, that makes
the computation rather slower that it could be for real matrices.

(file #31108)
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Additional Item Attachment:

File name: sparse_norm.patch              Size:2 KB


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