Hello, Iteration works faster indeed but all the other operations perform worse. It is also true that the current implementation is not tuned for memory locality. It's basically the same implementation used by the map having changed only the container. However the difference in performance are quite big. Also, I have performed some benchmarking myself on std::set vs intrusive set using variables that are declared in contigous memory zones and intrusive_set is performing better when compiled with -O2, -O3 but it performs worse when compiled without any optimization flag. Also, for a small number of elements (that is the case in our trie too) std::set performs better any time. I have tested insert / find / erase operations. (Those are the most common operations involved in std::trie to). Cosmin