bugGNU Octave - Bugs: bug #38628, bsxfun slow for complex

 
 

bug #38628: bsxfun slow for complex

Submitted by:  John Hunt <huntj>
Submitted on:  Fri 29 Mar 2013 07:17:37 PM UTC  
 
Category: InterpreterSeverity: 3 - Normal
Priority: 5 - NormalItem Group: Performance
Status: ConfirmedAssigned to: None
Originator Name: Open/Closed: Open
Release: devOperating System: GNU/Linux

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Thu 04 Apr 2013 02:38:11 AM UTC, comment #2:

Exceedingly strange. This is, perhaps, a clue. If dx is promoted to a complex matrix (with 0 for the imaginary part) then the bsxfun call goes back to being extremely fast.

Rik <rik5>
Project Administrator
Wed 03 Apr 2013 07:01:30 PM UTC, comment #1:

Hm, this is quite bizarre. I'll try to remember to look into this later.

Jordi GutiƩrrez Hermoso <jordigh>
Project Administrator
Fri 29 Mar 2013 07:17:37 PM UTC, original submission:

bsxfun is slow for complex array. Much slower than broadcasting.
trapz which uses bsxfun is impacted for instance.

these outputs are from dev
hg id -in
a695ee2dc17e+ 16392+

but it holds also for 3.6.3 and 3.6.4

John Hunt <huntj>

 

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    Follows 1 latest change.

    Date Changed By Updated Field Previous Value => Replaced By
    Wed 03 Apr 2013 07:01:30 PM UTCjordighStatusNone=>Confirmed

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