From help-request at octave dot org Wed Jan 11 08:01:48 2006 Subject: 2.9.4 speed From: Shai Ayal To: help at octave dot org Date: Wed, 11 Jan 2006 16:05:35 +0200 Hi all, With all your help I was able to install 2.9.4, using Quentin's SRPMS for ufsparse and glpk and applying a patch to the makefile as detailed in a previous email to the list by Ismail. I am testing it against 2.1.72. both versions were configured with the same options and use the same blas/atlas/fftw and compilers. I have a some code which constructs a 201^2x201^2 sparse matrix and inverts it. While the inversion speed is comparable for both versions, The part which constructs the I,J,S vectors which I later turn into the sparse matrix by s=sparse(I,J,S) takes almost twice as much time in 2.9.4 (12 seconds compared to 6 seconds). This part has a lot of loops, vector concatenations etc... Does this sound familiar to anyone, or should I investigate further? Shai ------------------------------------------------------------- Octave is freely available under the terms of the GNU GPL. Octave's home on the web: http://www.octave.org How to fund new projects: http://www.octave.org/funding.html Subscription information: http://www.octave.org/archive.html -------------------------------------------------------------