[Octave-bug-tracker] [bug #44703] 10X slowdown on Windows XP vs. Linux

[Philip Nienhuis]

Follow-up Comment #3, bug #44703 (project octave):

I wouldn't care too much about Win XP.

FWIW, I see quite different results on my multiboot box (all OSes running on
bare metal):

64-bit Octave on Win7 64-bit:
=====================
>> tic; lintst; toc
100 / 100 passed
Elapsed time is 13.5458 seconds.

32-bit Octave on 64-bit Win7:
=====================
>> tic; lintst; toc
100 / 100 passed
Elapsed time is 10.9326 seconds.

64-bit Octave on 64-bit Linux
=================
>> tic; lintst; toc
100 / 100 passed
Elapsed time is 35.7887 seconds.


It was quite against my expectations to see 32-bit Octave being quite a bit
faster than 64-bit Octave; when reading & processing large .mat files at work
I often experience it differently.

I figured the slow results from the Linux side were probably due to having
reference BLAS rather than OpenBLAS. So I ran it again with a older
64-indexing 3.9.0+ build (built using MXE) where I had a symlink from
libblas.so-> libopenblas.so. Results:

octave:3> tic; lintst; toc
100 / 100 passed
Elapsed time is 36.582 seconds.



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