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[Octave-bug-tracker] [bug #60928] Performance of sort unexpectedly slow


From: Rik
Subject: [Octave-bug-tracker] [bug #60928] Performance of sort unexpectedly slow for DIM=2
Date: Tue, 17 Aug 2021 13:11:05 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Safari/537.36

Follow-up Comment #22, bug #60928 (project octave):

filter.cc performance was also bad as would be predicted by the use of the
while loop.  Timings for before and after are shown below.


## Baseline
DIM1: 0.020907
DIM2: 2.158784
DIM3: 0.464140
DIM4: 0.018331
---------------
## division fix
DIM1: 0.020159
DIM2: 0.020605
DIM3: 0.020099
DIM4: 0.018271


A very nice 100X improvement along dimension 2!  See changeset
http://hg.savannah.gnu.org/hgweb/octave/rev/e3e0193963ea.


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