There's some general info here, including a comparison to SQLite: https://objectbox.io/dev-get-started/
For Android, there's even a repository to test it yourself: https://github.com/objectbox/objectbox-performance
For Android, there's even a repository to test it yourself: https://github.com/objectbox/objectbox-performance
I'd be more interested to see comparison to, for example, Realm[1].
EDIT: I see the 'objectbox-go' repo has a separate set of perf tests, but only for ObjectBox Go -- not either of the unnamed "NoSQL" competitors, nor for SQLite.