From my cursory understanding there is following. There is a n async protocol for `postgres` crate called `tokio-postgres`[1] (it's a child crate that is enable

From my cursory understanding there is following. There is a n async protocol for `postgres` crate called `tokio-postgres`[1] (it's a child crate that is enabled via feature). However, either only Postgres supports async protocols or there isn't an async protocol for Rust outside of `tokio-postgres`. However, Diesel uses `libpq` over `postgres` (and its child crate `tokio-postgres`). Moving from `libpq` to `rust-postgres` would cause a lot of damage. [1]https://github.com/sfackler/rust-postgres/tree/master/tokio-postgres https://github.com/sfackler/rust-postgres/tree/master/tokio-...