Anyone know what’s the fastest embedded key/value store ? (Which is written in Rust or has a Rust wrapper)

I don’t care about safety and consistency, I need pure speed and disk space efficiency

Satonomics has been using for a while now Sanakirja which is quite good but needs a ton of space. Ive tried in the past heed (lmdb) and redb but they were worse performance wise, at least then, I might need to try again, am I missing another player ?