Any of those open source?
If not, I may try to use #NDK to start one. Realized I need one for a new project idea :)
Discussion
They aren’t. It’s a super hard problem.
Interesting. I wonder what they are indexing for and why it’s hard. Off the bat some basic indexing doesn’t seem to bad? Is there a Wikipedia page or something that describes the general problem?
For example I’m thinking I’d like to find all notes in all threads that had a certain level of engagement (likes, reposts, comments) - is that an indexing problem?