bugGNU Octave - Bugs: bug #55205, Speedup conv function by factor...

 
 

bug #55205: Speedup conv function by factor 7-8 by using conv2 instead of filter internally

Submitted by:  Kai Torben Ohlhus <siko1056>
Submitted on:  Tue 11 Dec 2018 04:17:58 PM UTC  
 
Category:  Interpreter Severity:  1 - Wish
Priority:  5 - Normal Item Group:  Performance
Status:  Fixed Assigned to:  Kai Torben Ohlhus <siko1056>
Originator Name:  Open/Closed:  Closed
Release:  dev Operating System:  Any

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Wed 12 Dec 2018 01:48:45 PM UTC, comment #1: 
Kai Torben Ohlhus <siko1056>
Project MemberIn charge of this item.
Tue 11 Dec 2018 04:17:58 PM UTC, original submission:  

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.

Kai Torben Ohlhus <siko1056>
Project MemberIn charge of this item.

 

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Attached Files
file #45631:  conv_speedup_test.zip added by siko1056 (1KiB - application/zip)

 

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    Follow 5 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2018-12-12 siko1056 StatusIn Progress => Fixed
        Open/ClosedOpen => Closed
    2018-12-11 siko1056 SummarySpeedup conv function by factor 7-8 by using conv2 instead of filter interally => Speedup conv function by factor 7-8 by using conv2 instead of filter internally
    2018-12-11 siko1056 Attached File- => Added conv_speedup_test.zip, #45631
        Carbon-Copy- => Added florian.buenger@tuhh.de

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