Gregory's Server
The experiment of using roaring bitmaps as the foundation for indexing #ActivityPub objects is half successful and half not.
The good news is that soon I'll be able to replace the #brutalinks client access to it's activitypub backend with something that's built on top of local storage that makes use of the indexes, therefore being much, much faster.
The bad news is that adding indexing to the storage backends themselves didn't result in too much performance gains, but I just suspect I'm doing something wrong.