For what it's worth, there's this bit from the parallel-hashmap readme: > We encourage phmap users to switch to gtl if possible. gtl provides the same function

For what it's worth, there's this bit from the parallel-hashmap readme: > We encourage phmap users to switch to gtl if possible. gtl provides the same functionality as this repository, but requires C++20 or above. And the benchmarks do include gtl.