Fibonacci Hashing: A Surprisingly Fast Hash Table Optimization

This article explores Fibonacci Hashing, a technique for mapping hash values to slots in a hash table that leverages the properties of the golden ratio. Benchmarks show it significantly outperforms traditional integer modulo operations, offering faster lookups and better robustness against problematic input patterns. The author explains the underlying mathematics and demonstrates its advantages, highlighting how it addresses common performance bottlenecks in hash table implementations. While not a perfect hash function, Fibonacci Hashing excels at mapping large numbers to smaller ranges, making it a valuable optimization for creating efficient hash tables.