Standard library maps/unordered_maps are themselves notoriously slow anyway. A flat_hash_map from abseil or parallel-hashmaps[1] would be better. [1] https://g

Standard library maps/unordered_maps are themselves notoriously slow anyway. A flat_hash_map from abseil or parallel-hashmaps[1] would be better. [1] https://github.com/greg7mdp/parallel-hashmap https://github.com/greg7mdp/parallel-hashmap