[Octave-bug-tracker] [bug #59702] Octave 6 slower then Octave 5 ?

[Charles Praplan]

URL:
  <https://savannah.gnu.org/bugs/?59702>

                 Summary: Octave 6 slower then Octave 5 ?
                 Project: GNU Octave
            Submitted by: charprap
            Submitted on: Wed 16 Dec 2020 01:07:59 PM UTC
                Category: None
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Performance
                  Status: None
             Assigned to: None
         Originator Name: Charles Praplan
        Originator Email: 
             Open/Closed: Open
                 Release: 6.1.0
         Discussion Lock: Any
        Operating System: Microsoft Windows

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Details:

I have noticed that Octave 6.1.0 seems to be slower than Octave 5.2.0.
This is already visible at startup when loading the prolog, but this is not
the issue.

Here is another example using dlmread. Below is a summary of the time needed
to read the appended data file (from a SSD drive) with the appended script.

               Small data file    Large data file (100x)
                 (appended)
octave 5.2.0 : 0.502303 seconds   49.4749 seconds
octave 6.1.0 : 1.99895 seconds    213.084 seconds
matlab 2019a : 0.104778 seconds   4.539602 seconds

There is factor 4 between version 5 and 6!

Can somebody explain this?




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File Attachments:


-------------------------------------------------------
Date: Wed 16 Dec 2020 01:07:59 PM UTC  Name: data_2n_part_50ksamp.csv  Size:
1MiB   By: charprap

<http://savannah.gnu.org/bugs/download.php?file_id=50488>
-------------------------------------------------------
Date: Wed 16 Dec 2020 01:07:59 PM UTC  Name:
V6_slower_than_V5_dlmread_test_case.m  Size: 157B   By: charprap

<http://savannah.gnu.org/bugs/download.php?file_id=50489>

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