octave-bug-tracker
[Top][All Lists]
Advanced
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Octave-bug-tracker] [bug #50796] calling find on diagonal matrix is slo

From: Juan Pablo Carbajal
Subject: [Octave-bug-tracker] [bug #50796] calling find on diagonal matrix is slower than full matrix
Date: Thu, 13 Apr 2017 10:14:23 -0400 (EDT)
User-agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.133 Safari/537.36 
Follow-up Comment #1, bug #50796 (project octave):

The attached script produces (using function speed)


> find_timeit
Order, time per operation (ones)
Full: 1.7, 3.2e-08
Diag: 2.1, 1.4e-09
Opt: 0.28, 2.4e-06

Order, time per operation (bool)
Full: -0.0084, 1.4e-05
Diag: 0.056, 8.6e-06
Opt: 0.4, 9.8e-07


So it seems the problem is with doubles, as booleans are close to the optimal.
I am puzzled by the negative order of the boolean full case.

(file #40391)
    _______________________________________________________

Additional Item Attachment:

File name: find_timeit.m                  Size:0 KB


    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?50796>

_______________________________________________
  Message sent via/by Savannah
  http://savannah.gnu.org/
reply via email to
[Prev in Thread] Current Thread [Next in Thread]