bugGNU Octave - Bugs: bug #54422, Declining Octave performance over...

 
 

bug #54422: Declining Octave performance over time

Submitted by:  Rik <rik5>
Submitted on:  Wed 01 Aug 2018 09:01:32 PM UTC  
 
Category:  Interpreter Severity:  3 - Normal
Priority:  5 - Normal Item Group:  Performance
Status:  None Assigned to:  None
Originator Name:  Open/Closed:  Open
Release:  dev Operating System:  GNU/Linux

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Thu 02 Aug 2018 03:38:34 PM UTC, comment #2:

Whoops, It's attached now.

(file #44687)

Rik <rik5>
Project Administrator
Thu 02 Aug 2018 08:14:56 AM UTC, comment #1:

@Rik: it seems you forgot the attachment.

Marco Caliari <caliari>
Project Member
Wed 01 Aug 2018 09:01:32 PM UTC, original submission:

I happened to be looking at an old bug which had examples of three for loops. I have attached the script as bm_accum.m. When I run the script in an old release (3.4.3) of Octave I get

When I run it with the current development branch I get

There are slowdowns of from 4X-7.5X.

To make sure this wasn't a measurement artifiact within Octave I tried using the tcsh shell's time command.

and

Again, a significant 5.5X difference.

Rik <rik5>
Project Administrator

 

(Note: upload size limit is set to 16384 kB, after insertion of the required escape characters.)

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Attached Files
file #44687:  bm_accum.m added by rik5 (147B - text/x-matlab)

 

Depends on the following items: None found

Items that depend on this one: None found

 

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    Follows 1 latest change.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-08-02 rik5 Attached File- => Added bm_accum.m, #44687

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