Need a maintained, stable concurrent / lockless hashmap

Can you recommend a crate that has a good concurrent hashmap implementation that allows to do an atomic "insert if not exists" operation?

I recommend dashmap.

1 Like

How do I do "insert if not exists" atomically in DashMap?

try_entry() then or_insert() should do it.

Ok, thanks, when reading the docs, it wasn't apparent to me that getting an entry actually locks it.