# Uses of Package
org.apache.datasketches.hll

Packages that use org.apache.datasketches.hll
org.apache.datasketches.hll: The DataSketches™ HLL sketch family package `HllSketch` and `Union` are the public facing classes of this high performance implementation of Phillipe Flajolet's HyperLogLog algorithm[1] but with significantly improved error behavior and important features that can be essential for large production systems that must handle massive data.

Classes in org.apache.datasketches.hll used by org.apache.datasketches.hll
Class and Description
HllSketch The HllSketch is actually a collection of compact implementations of Phillipe Flajolet’s HyperLogLog (HLL) sketch but with significantly improved error behavior and excellent speed performance.
TgtHllType Specifies the target type of HLL sketch to be created.
Union This performs union operations for all HllSketches.