[MacPorts] #17218: octave optimized?

[MacPorts]

#17218: octave optimized?
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 Reporter:  hans at fugal.net  |       Owner:  macports-tickets at lists.macosforge.org
     Type:  enhancement     |      Status:  new                                  
 Priority:  Low             |   Milestone:  Port Bugs                            
Component:  ports           |     Version:  1.6.0                                
 Keywords:                  |        Port:  octave                               
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 Octave on my laptop is seeing a much-reduced speedup with sparse matrices
 when compared to linux on similar hardware.

 x = rand(1000,1000);
 y = x;
 y(y<0.99) = 0;
 z = sparse(y);
 tic; x*x; toc
 tic; x*y; toc
 tic; x*z; toc

 I see times on the order of 0.68 for x*x and x*y, and 0.62 for x*z, but on
 linux my friend (with a macbook pro - I have a macbook) sees on the order
 of 0.9 for x*x, x*y and 0.15 for x*z. I'm happy general matrix
 multiplication seems faster with the macports version, but I'd love to see
 a more substantial speedup for sparse matrices. I don't know if there
 might be some compile-time options for optimization to this or the sparse
 matrix library, or if there might be something to explain it away in the
 architecture, hardware, or OS, but I put it out there FWIW.

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Ticket URL: <http://trac.macports.org/ticket/17218>
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