Details here: https://github.com/LemmyNet/lemmy/issues/3165
This will VASTLY decrease the server load of I/O for PostgreSQL, as this mistaken code is doing writes of ~1700 rows (each known Lemmy instance in the database) on every single comment & post creation. This creates record-locking issues given it is writes, which are harsh on the system. Once this is fixed, some site operators will be able to downgrade their hardware! ;)
We have had DBA’s, the problem is the Rust code uses ORM and an auto JSON framework that makes tracing the code time-consuming to learn.
Okay so you may need to refactor here and there to get more performance.