[fenesiistvan]

One important consideration is missing from this benchmark: how they behave with multi-threading. There can be big differences between diffent hash table implementation when you have to use them from different threads (built-in smart thread safety vs external dumb locks, etc)

[CyberDildonics]

That has nothing to do with this. Granular lock free tables will outperform global locking by orders of magnitude, but it has to be designed differently from the ground up.