[Octave-bug-tracker] [bug #55707] graphics backend takes long when plotting many lines

[Pantxo Diribarne]

Follow-up Comment #8, bug #55707 (project octave):

@Markus, Rik: At least, Lachlan stated in bug #47052, that when creating line
objects most of the time was spent initializing graphics_objects. A way to see
that line objects rendering is quite fast is to try to use the "pan" tool on
the figure:

tic; plot (1:1000, 10); toc ## -> 28s on my system


Panning is fast: I can't see jagged rendering which means that it doesn't take
more than a few 10ms for each redraw.

On the contrary the example from bug #40663 is slow the first time (when
creating patch objects) but also when panning


a = randn(1000,3);
scatter(a(:,1),a(:,2),[],a(:,3));



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