[Octave-bug-tracker] [bug #55908] Closing plots much slower in Octave 5.1.0

[Rik]

Update of bug #55908 (project octave):

                 Summary: Closing 2D plots much slower in Octave 5.1.0 =>
Closing plots much slower in Octave 5.1.0

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Follow-up Comment #2:

I think that a small delay may have been introduced in the deletion of
graphics objects to work around cross-thread issues between the GUI and the
main interpreter thread.  But that might be completely off.

In any case, this happens for both 2-D and 3-D plots so I have changed the
Summary to reflect that.

For the 2-D case, I used


clf;
hl = plot (rand (2, 1000));
tic; close; toc


For version 4.4.1 this takes 60 milliseconds, but 340 milliseconds with 5.1.0.
 That is approximately a factor of 5 slowdown.  That isn't as bad as the
reporter's 60X slowdown for a 3-D scene, but still bad.



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