What if we tried Less Power? – Lessons from studying the power of choices in hashing-based data structures

07/02/2023

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by   Stefan Walzer, et al.

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In the first part of this survey, we review how the power of two choices underlies space-efficient data structures like cuckoo hash tables. We'll find that the additional power afforded by more than 2 choices is often outweighed by the additional costs they bring. In the second part, we present a data structure where choices play a role at coarser than per-element granularity. In some sense, we rely on the power of 1+ϵ choices.