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Fun note: Because of this line in the article

> Because MDBM gives you raw pointers into the DB’s data, you have to be very careful about making sure you don’t have array over-runs, invalid pointer access, or the like.

Someone wrote a Rust binding http://erickt.github.io/blog/2014/12/13/rust-and-mdbm/

Wow that's a very interesting post! Maybe I should try to bring a rust binding to my project as well..

https://github.com/pmwkaa/engine.so

LMDB

I would expect this hash table to be much faster than LMDB for tables that fit in RAM. It doesn't have transactions or any kind of concurrent access guarantees so naturally it has lower access overhead. For data sets larger than RAM, or in multithreaded environments, it will be pretty unusable.