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

From: Carlo de Falco
Subject: [Octave-bug-tracker] [bug #41453] norm is really slow for sparse matrices
Date: Tue, 01 Apr 2014 12:41:56 +0000
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:28.0) Gecko/20100101 Firefox/28.0 
Follow-up Comment #13, bug #41453 (project octave):

Your matrices are non very sparse, can you try again with


A = sprandn(10000, 10000, 0.01); tic, norm (A); toc


as I had suggested before?

also, consider that your results should be compared to:


A = sprandn(8000, 8000, 0.1); tic, svds (A,1,'L'); toc
Elapsed time is 13.895 seconds.


I still see a factor 100 ...




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