Hash and Displace: Efficient Evaluation of Minimal Perfect Hash Functions

  • Authors:
  • Rasmus Pagh

  • Affiliations:
  • -

  • Venue:
  • WADS '99 Proceedings of the 6th International Workshop on Algorithms and Data Structures
  • Year:
  • 1999

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Abstract

A new way of constructing (minimal) perfect hash functions is described. The technique considerably reduces the overhead associated with resolving buckets in two-level hashing schemes. Two memory probes suffice for evaluation of the function. This improves the probe performance of previous minimal perfect hashing schemes, and is shown to be optimal.