To further support your point, the engineers at Facebook who worked on the F14 hashmaps/hashsets saw the same issues, and created two implementations as a resul

To further support your point, the engineers at Facebook who worked on the F14 hashmaps/hashsets saw the same issues, and created two implementations as a result: “Folly has chosen to expose a fast C++ class without reference stability as well as a slower C++ class that allocates each entry in a separate node. The node-based version is not fully standard compliant, but it is drop-in compatible with the standard version in all the real code we’ve seen.” https://engineering.fb.com/2019/04/25/developer-tools/f14/ https://engineering.fb.com/2019/04/25/developer-tools/f14/