Tholey 2004; Chazelle, Kilian, Rubinfeld, Tal 2007; Botelho, Pagh, Ziviani 2009; Belazzougui, Botelho, Dietzfelbinger Problem Definition A minimal perfect hash function (MPHF) is a (data structure providing a) bijective map from a set S of n keys to the set of the first n natural numbe...
FILE* mphf_fd = fopen("temp.mph","w");//Source of keyscmph_io_adapter_t *source = cmph_io_vector_adapter((char**)vector, nkeys);//Create minimal perfect hash function using the brz algorithm.cmph_config_t *config =cmph_config_new(source); cmph_config_set_algo(config, CMPH_...
usually from 0 to n−1. Besides providing single-step lookup, a minimal perfect hash function also yields a compact hash table, without any vacant slots. Minimal perfect hash functions are much harder to find than perfect ones with a wider range....
A new algorithm for finding minimal perfect hash functions (MPHF) is proposed. The algorithm given three pseudorandom functions, h0, h1 and h2, searches for a function g such that F(w)=(h0(w)+(h1(w))+g(h2(w)) mod m is a MPHF, where m is a number of input words. The algori...
Summary: A perfect hash function (PHF) $h: Uightarrow [0,m - 1]$ for a key set $S$ is a function that maps the keys of $S$ to unique values. The minimum amount of space to represent a PHF for a given set $S$ is known to be approximately $1.44n ^{2}/m$ bits, where ...
Given a setSofndistinct keys, a functionfthat bijectively maps the keys ofSinto the firstnnatural numbers is called aminimal perfect hash function(MPHF) forS. Algorithms that find such functions whennis large and retain constant evaluation time are of practical interest. For instance, search engi...
Build order-preserving minimal perfect hash functions. Performance Performance was evaluated against other hash functions. As an input set, the fields of Debian Packages and Sources files was used, and each hash function was run 1,000,000 times for each word. The byte count of the words were...
A Scalable and Explicit Event Delivery Mechanism f A Scalable Concurrent malloc Implementation for F A Scalable Lock-free Stack Algorithm (2004). An Approach for Minimal Perfect Hash Function CAF - The C++ Actor Framework for Scalable and Re ...
Minimal and almost minimal perfect hash function search with application to natural language lexicon design - ScienceDirect Minimal and almost minimal perfect hash function search with application to natural language lexicon design - Cercone, Krause, et al. - 1983... Nick,Cercone,and,... - 《...
perfect hashingsparse tablesspace complexityWe consider the following problem: Given a subset S of size n of a universe {0,..., u - 1}, construct a minimal perfect hash function for 5, i.e., a bijection h from 5 to {0,..., n - 1}. The parameters...