Perhaps the most significant downside of cuckoo hashing, however, is that it potentially requires checking multiple memory regions randomly distributed throughout the table. In many settings, such random access lookups are expensive, making cuckoo hashing a less compelling alternative. We design a variant of cuckoo hashing that reduces the number of memory regions accessed, increase the load threshold and remains relatively simple. We do this by choosing some less popular options for cuckoo hashing with a couple of novel ideas.

source: solar