2.9.4 speed

[Shai Ayal]

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



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