hashmap 3 functional-programming 3 effects 3 dictionary 3 data-structures 3 compare-and-swap 3 avl-tree 3 2-3-tree 3 hashtable 3 immutable 3 lock-free 3 map 3 memory-efficient 3 Atomic 3 Thread-safe 3 Dictionary 3 Tree 3 Balanced 3 open-addressing 3 performance 3 Avl 3 Map 3 Persistent 3 persistent 3 Functional 3 robinhood-hashmap 3 sum-types 3 value-semantics 3 SumType 2 Union 2 Discriminated 2 Algebraic 2 Ref 2 Self 2 2-3Tree 2 Immutable 2 Simple 2 Performance 2 FP 2 Immutability 1 HashMap 1 Concurrency 1