Stl Alternative

robin-hood-hashingC++

A fast and memory-efficient C++ hashmap implementation using robin hood hashing as a drop-in replacement for std::unordered_map/set.

robin-mapC++

A C++ header-only library providing fast hash map and hash set implementations using robin hood hashing with open addressing.

unordered_denseC++

A fast, densely stored C++17+ hashmap and hashset using robin-hood backward shift deletion, offering near-drop-in replacements for std::unordered_map/set.