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[Octave-bug-tracker] [bug #43519] eigs really slow compared to Matlab

From: Rik
Subject: [Octave-bug-tracker] [bug #43519] eigs really slow compared to Matlab
Date: Mon, 03 Nov 2014 23:22:48 +0000
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:33.0) Gecko/20100101 Firefox/33.0

Follow-up Comment #4, bug #43519 (project octave):

On my computer the situation is reversed and the sparse case runs much faster
than the full one.

With L = 2000 and the example code from comment #2,

octave:1> L = 2e3
L =  2000
octave:2> eigs_perf
Elapsed time is 3.27069 seconds.
Elapsed time is 0.664507 seconds.

This is Octave version 3.8.2 compiled from scratch running on Kubuntu 12.04. 
The arpack library is version 3.0.2-3.


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