Cuckoo Filters

Cuckoo filters are a data structure used to quickly check if an item is in a set, similar to a filter or checklist. They store small fingerprints of items rather than the full data, saving space. When you add an item, the filter places its fingerprint in a specific position based on a hash function. To check for an item, it looks in a few possible spots. They allow fast insertions and lookups, use less memory than traditional methods, and can be efficiently updated. Cuckoo filters are useful for applications like network security and databases where quick, memory-efficient presence checking is needed.