Module traits 

Core traits for streaming algorithms

All sketches implement the base Sketch trait, with specialized traits for different algorithm families (cardinality, frequency, quantiles, etc.)

Structs

ErrorBounds

Error bounds for a sketch estimate

Enums

DecodeError

Error during sketch decoding

MergeError

Error during sketch merge operation

Traits

CardinalitySketch

Cardinality (distinct count) estimation sketches

FrequencySketch

Frequency estimation sketches

HeavyHitters

Heavy hitters / Top-K capability

MembershipSketch

Membership testing sketches (Bloom filters, etc.)

QuantileSketch

Quantile estimation sketches

SamplingSketch

Sampling sketches

SetSketch

Set operation sketches (Theta sketch, etc.)

Sketch

Core trait for all streaming sketches