Rhino WIP Feature: General Optimization

[Charles]

@andy

Display performance for files with large numbers of objects.

This one:

Displaying selected elements takes too long

The following applies to Rhino WIP using Direct3D. It’s more or less the same with OpenGL, and it’s the same in Rhino 8. There is a file with ~300000 flat curves. The display performance is excellent when zooming etc.. But not when the curves are selected. Or when we select one curve by a single mouse click. The video shows the effect using TestMaxSpeed: Unselected: 2sec. Selected: 43sec. I wonder why yellow elements take so much longer to display? We can feel the lack of speed …

Updated figures:
Unselected: 0.62sec.
Selected: 54sec.
(9.0.26013.12305, 2026-01-13)