[Octave-bug-tracker] [bug #56752] Performance slowdown from version 3.2.4 through to current dev branch

[Rik]

Follow-up Comment #1, bug #56752 (project octave):

To check whether it is the execution of loops versus the execution of
statements in the body of loops, I ran the following empty loop body test.


a = 1; b = 1; tic; for i=1:1000; for j=1:1000;   ; end; end; toc


The script is attached as bm.empty_loop.m

Results were


Version   3.2.4     3.4.3     3.6.4     3.8.2     4.0.3     4.2.1     4.4.1   
 5.1.0     dev (6.1.0)

          0.053467                                0.0782108 0.0723422 0.128019
 0.1248    0.096776


There was a small decline in performance.  However, 50 milliseconds is no
where near as important as the 7 seconds seen in the toeplitz benchmark which
included assignments, function calls, etc.


(file #47330)
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Additional Item Attachment:

File name: bm.empty_loop.m                Size:0 KB
    <https://savannah.gnu.org/file/bm.empty_loop.m?file_id=47330>



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