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» Hash and Displace: Efficient Evaluation of Minimal Perfect H...
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WWW
2007
ACM
14 years 6 months ago
GigaHash: scalable minimal perfect hashing for billions of urls
A minimal perfect function maps a static set of keys on to the range of integers {0,1,2, ... , - 1}. We present a scalable high performance algorithm based on random graphs for ...
Kumar Chellapilla, Anton Mityagin, Denis Xavier Ch...
SBBD
2008
256views Database» more  SBBD 2008»
13 years 7 months ago
Indexing Internal Memory with Minimal Perfect Hash Functions
A perfect hash function (PHF) is an injective function that maps keys from a set S to unique values, which are in turn used to index a hash table. Since no collisions occur, each k...
Fabiano C. Botelho, Hendrickson R. Langbehn, Guilh...
ICGA
2008
113views Optimization» more  ICGA 2008»
13 years 5 months ago
Move Generation with Perfect Hash Functions
We present two new perfect hashing schemes that can be used for efficient bitboard move generation for sliding pieces in chess-like board games without the need to use rotated bit...
Trevor I. Fenner, Mark Levene
ESA
2009
Springer
346views Algorithms» more  ESA 2009»
14 years 9 days ago
Hash, Displace, and Compress
A hash function h, i.e., a function from the set U of all keys to the range range [m] = {0, . . . , m − 1} is called a perfect hash function (PHF) for a subset S ⊆ U of size n ...
Djamal Belazzougui, Fabiano C. Botelho, Martin Die...