For a project I have added a lot of categories, a few thousand. In the front end that doesn't seem to be a problem, but clicking some categories in the back end is terribly slow. It seems as if each choice is processed at the spot, not after actually saving the post. When I click on the checkbox of a category I have to wait for a second or two/three to see the box being checked. When I want to check a dozen categories... that isn't really going smoothly.
I think this has to be altered in the core, but I'm no php programmer ;)
A few thousand categories? What on earth for?
To display different aspects of different countries all over the world.
For instance, the main category 'income' or 'profession' > countries > regions. With all kinds of main categories and with all the 'identical' subcategories that will result in many many categories. I have no idea how to do it otherwise, because I need to use a visual way of choosing the final page with posts. I'm using maps for this.
Edit: this way, each main category has 118 sub categories.
Question: Could I accomplish this by not nesting the categories but keeping them all at the same level?
For instance:
Income > Country > France > Region 22 > Posts
If these are now subcategories, could I achieve the same thing (populating lists so that I can make maps with links) if I would keep all the categories at the same level???
