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[Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slo
From: |
kody law |
Subject: |
[Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab! |
Date: |
Sat, 20 Nov 2010 18:33:07 +0000 |
User-agent: |
Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101026 Firefox/3.6.12 |
Follow-up Comment #2, bug #31709 (project octave):
Many thanks for your prompt response and cursory glance, Rik!
I appreciate the suggestions and pointer to matlab's page. I know about the
loop deficiency with both matlab and octave, and this might be the thing that
drives me to a lower level language.
Sometimes loops are absolutely necessary.
I am afraid you did not read my submission, so let me try to clarify a few
points.
i) this routine cannot be vectorized, to my knowledge (and I am something of
an expert at optimizing and vectorizing code and using matlab as well).
ii) I am talking about an ORDER OF MAGNITUDE difference BETWEEN MATLAB AND
OCTAVE!
iii) pre-allocation will not help here either.
iv) there are no optimized library functions I know of to replace anything
here.
It is necessary to follow the path of each site through its cycle of
permutations. There is no other way. There IS a MAJOR problem with octave
hidden here.
This submission should NOT be closed.
Thanks
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- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, kody law, 2010/11/19
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, Rik, 2010/11/20
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!,
kody law <=
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, Søren Hauberg, 2010/11/20
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, kody law, 2010/11/20
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, Søren Hauberg, 2010/11/21
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, kody law, 2010/11/21
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, Rik, 2010/11/21
- [Octave-bug-tracker] [bug #31709] simple routine which runs 20 times slower on octave vs. matlab!, kody law, 2010/11/21