Was it on this group that someone just posted how to edit the
right-click list?::

https://technicalustad.com/edit-wind...-context-menu/

No matter. The question is, Won't making the list longer mean it will
take longer to open the right click list?

It already takes a long time, and I've concluded that it builds the list
from another list every time I right click.

Am I right, or if not, why does it take so long to right=click and see
the list, compared to most other operations?