HyperLogLog is used at run time in 1 crate. It's used only as a dev dependency in 3 crates.

Depender (with downloads and own rev deps) HyperLogLog version
200 saimiris ^1.0.2
49K 2 cardinality-estimator dev ^1.0.2
360 cardinality-estimator-safe dev ^1.0.2
100 hypertwobits dev ^1.0.2