[Octave-bug-tracker] [bug #55205] Speedup conv function by factor 7-8 by using conv2 instead of filter interally

[Kai Torben Ohlhus]

URL:
  <https://savannah.gnu.org/bugs/?55205>

                 Summary: Speedup conv function by factor 7-8 by using conv2
instead of filter interally
                 Project: GNU Octave
            Submitted by: siko1056
            Submitted on: Tue 11 Dec 2018 05:17:58 PM CET
                Category: Interpreter
                Severity: 1 - Wish
                Priority: 5 - Normal
              Item Group: Performance
                  Status: In Progress
             Assigned to: siko1056
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

A colleague of mine pointed me to the fact, that Octave's conv function can be
speeded up by factor 7-8 by switching to the conv2 function internally.  Since
1994 Octave uses filter to compute the convolution.

Even filter2 uses conv2 internally ;-)

If you want to test the speedup, look at the attached example.



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File Attachments:


-------------------------------------------------------
Date: Tue 11 Dec 2018 05:17:58 PM CET  Name: conv_speedup_test.zip  Size: 1KiB
  By: siko1056

<http://savannah.gnu.org/bugs/download.php?file_id=45631>

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