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[Octave-bug-tracker] [bug #55707] graphics backend takes long when plott

From: Pantxo Diribarne
Subject: [Octave-bug-tracker] [bug #55707] graphics backend takes long when plotting many lines
Date: Thu, 14 Feb 2019 10:49:09 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Firefox/60.0

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);


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