Tag Cloud on Category Page

Ok here’s the challenge.

I want to display a tag cloud on category pages.

So for a given category, I want to show a tag cloud of tags that posts within that category have. I’m not looking to show a tag cloud of tags for posts within a certain category on another page, but rather on a category page itself.

The concerns are filtering out duplicates, not relying on some crazy intensive queries, and making it so I don’t have to make more than one category.php file.

So, who’s got ideas!? ??

PS:

• There are already posts about this, I know. They’re all pretty unhelpful. They’re more theories or using too many queries or focussed on displaying the list of tags on a non-category page.
• There is a plugin that helps with this, I know. https://www.ads-software.com/extend/plugins/tdo-tag-fixes/ But I don’t want to do it with a plugin — too bloated.