My goal of developing Datalevin is to replace our use of both Datomic and Postgres, so we have a single DB. The aim is to provide a versatile database that meets data needs of most use cases.
I mention Sqlite in README because I have not finished the query engine rewrite of Datalevin, so the query performance is not up to my standard of being competitive with relational databases for large data sets. However, even at the current state, Datalevin is already faster than the alternative Datalog stores in the Clojure world for the most part.
Finally, since you seems to want to go into this space, I will mention that: without some new tricks in query algorithms, triple stores would be always slower than standard relational DBs. This is not a solved problem. Just be aware what you are getting yourself into.
