Hi,

Cargo's resolver has a long standing TODO:
"We should switch to persistent hash maps if we can..."
So when I watched your talk at RustFest Paris I thought I'd make the introductions. So if/when this crate is ready, perhaps a pr thare?

The comment is somewhat out of date. Thanks to a lot of profiling most things are wrapped in RC/ARC and are bespoke custom persistent data structures. So I suspect it will improve ergonomics more then speed, but I'd be happy to be wrong.