[Octave-bug-tracker] [bug #53845] Octave too slow when plotting large arrays with QT graphics toolkit

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?53845>

                 Summary: Octave too slow when plotting large arrays with QT
graphics toolkit
                 Project: GNU Octave
            Submitted by: None
            Submitted on: Sun 06 May 2018 02:07:04 AM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Performance
                  Status: None
             Assigned to: None
         Originator Name: Alex
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 4.4.0
        Operating System: Microsoft Windows

    _______________________________________________________

Details:

Octave 4.2.2 and 4.4.0, Win32 or Win64, with standard installation from ZIP
file, in Windows 10, running QT graphics toolkit, gets very slow when plotting
large arrays. Just start the Octave gui and type plot(1:10^6);
plot(10^6:-1:1). The Octave becomes very slow, almost freezing, and sometimes,
by shifting the focus from the figure to the command window, it does not
respond. The same does not happen when Octave 4.2.1 is running on the same
computer or when the Gnuplot is set as the graphics toolkit.






    _______________________________________________________

Reply to this item at:

  <http://savannah.gnu.org/bugs/?53845>

_______________________________________________
  Message sent via Savannah
  https://savannah.gnu.org/