From maintainers-request at octave dot org Sat Nov 20 08:36:11 2004
Subject: Re: How to make Octave build and run natively on Windows?
From: "Laurent Mazet" <mazet at softndesign dot org>
To: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>,         "Laurent Mazet" <mazet@secure.softndesign.org>
Cc: <maintainers at octave dot org>, "Ole Jacob Hagen" <waterthrill@yahoo.no>,         "David Bateman" <David.Bateman@motorola.com>,         "Laurent Mazet" <laurent.mazet@motorola.com>
Date: Sat, 20 Nov 2004 06:02:26 -0600

"John W. Eaton" <jwe at bevo dot che dot wisc dot edu> said:
> On 19-Nov-2004, Laurent Mazet <mazet at secure dot softndesign dot org> wrote:
..
> | On the same computer, I run the standard Octave2.m test on octave 2.1.50a
> | from  http://octave.sf.net i.e. with octave-forge and a blas optimzed for
> | PIII (some segfault on my Duron :-( ):
> 
> If the BLAS is optimized for PIII, then couldn't that be the reason
> that you are seeing different results rather than it being linked with
> Cygwin?  It seems to me that we need a comparison where the only
> difference is Cygwin vs. no Cygwin.

Same benchmaks on octave 2.1.49 CygWin from ftp://ftp.octave.org

   Octave Benchmark 2
   ==================
Number of times each test is run__________________________: 3

   I. Matrix calculation
   ---------------------
Creation, transp., deformation of a 1500x1500 matrix (sec): 3.996
800x800 normal distributed random matrix ^1000______ (sec): 0.7217
Sorting of 2,000,000 random values__________________ (sec): 15.36
700x700 cross-product matrix (b = a' * a)___________ (sec): 14.45
Linear regression over a 600x600 matrix (c = a \ b') (sec): 2.951
                  ------------------------------------------------------
                Trimmed geom. mean (2 extremes eliminated): 5.544

   II. Matrix functions
   --------------------
FFT over 800,000 random values______________________ (sec): 1.582
Eigenvalues of a 320x320 random matrix______________ (sec): 6.713
Determinant of a 650x650 random matrix______________ (sec): 3.755
Cholesky decomposition of a 900x900 matrix__________ (sec): 3.092
Inverse of a 400x400 random matrix__________________ (sec): 2.367
                  ------------------------------------------------------
                Trimmed geom. mean (2 extremes eliminated): 3.018

   III. Programmation
   ------------------
750,000 Fibonacci numbers calculation (vector calc)_ (sec): 1.987
Creation of a 2250x2250 Hilbert matrix (matrix calc) (sec): 4.368
Grand common divisors of 70,000 pairs (recursion)___ (sec): 1.126
Creation of a 220x220 Toeplitz matrix (loops)_______ (sec): 4.251
Escoufier's method on a 37x37 matrix (mixed)________ (sec): 6.555
                  ------------------------------------------------------
                Trimmed geom. mean (2 extremes eliminated): 3.329


Total time for all 15 tests_________________________ (sec): 73.27
Overall mean (sum of I, II and III trimmed means/3)_ (sec): 3.819
                      --- End of test ---


-- 
Dr. Laurent Mazet    -=-  /Use the source, Luke/  -=-   
mazet at softndesign dot org