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[Octave-bug-tracker] [bug #48085] Slow solving simultaneous equations by


From: Marco Caliari
Subject: [Octave-bug-tracker] [bug #48085] Slow solving simultaneous equations by LU decomposition for octave 4 on windows
Date: Wed, 15 Jun 2016 12:54:17 +0000 (UTC)
User-agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:47.0) Gecko/20100101 Firefox/47.0

Follow-up Comment #3, bug #48085 (project octave):

The title is misleading. It is not the lu decomposition itself to be slow (it
is not measured), but the solution *after* a lu decomposition. In particular,
one permutation matrix multiplication, one lower triangular solution and one
upper triangular solution. Since I'm on linux with no 3.8.x available, can you
please measure separately the three steps above? Solution of triangular
systems is managed by LAPACK dtrtrs, can you tell us which version of LAPACK
are you using?

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