I just had a layer with some 30000 assorted points, curves, surface and meshes. I wanted to get rid of them, because they were no longer relevant.
- set layer visible (yellow light) (takes more than 1 minute)
- select objects in layer
- delete (I had to kill rhino after 10 minutes at full CPU, this takes too long)
- set layer invisible (blue light)
- delete layer (takes a couple of seconds).
Why is there such a difference in time to delete large number of objects?