[Octave-bug-tracker] [bug #47052] Plotting many lines on a graph is slow

[Lachlan Andrew]

Follow-up Comment #8, bug #47052 (project octave):

I'm currently in the process of writing __next_line_style__ in C++, and that
will also require __pltopt__ to be translated to C++.

Since this is becoming rather a large patch, and Rik was flagging a major
rewrite, I'm not sure if I should go ahead. My current patch meets my needs.

If there is to be a major rewrite, some of the things I would suggest are:

- Each class like 'line' could have static defaults, with only those that are
overridden being initialized for each object.

- It may be faster to have named constants instead of strings for many of the
properties.  It would be just as slow when accessed from .m files, but faster
from C++.

- It may help to avoid rendering partial figures until they are fully drawn.

- Primitives like __next_line_style__, line and patch should probably be in
C++.

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