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

[RUILIN CHU]

Follow-up Comment #8, bug #43519 (project octave):

OK, I have tried many ways, the problem persists

 version
ans = 3.8.2
octave:2> for i=1:6
> L=i*1000;doit(L);
> end
L = 1000
full   : 0.627905
sparse : 8.175758
L = 2000
full   : 4.337341
sparse : 39.021067
L = 3000
full   : 9.973484
sparse : 75.483524
L = 4000
full   : 23.701398
sparse : 231.474810
L = 5000
full   : 44.528232
sparse : 365.127491
L = 6000
full   : 57.121317
sparse : 486.797995

I'm running CentOS 6.5 64bit on Intel(R) Xeon(R) CPU E5-1620 0 @ 3.60GHz with
8G memory, compiled with gfortran gcc 4.4.7-4,linked with ACML 4.4
gfortran64_mp,arpack_ng-3.1.5

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