Articles by tag: hyperloglog

ClickHouse aggregate functions: uniqHLL12, quantileTDigest, topK

uniqHLL12 for fast unique users, quantileTDigest for distributions, groupArray, topK, -If combinators. Examples of GGR, cohorts, retention.

HyperLogLog and Count-Min Sketch in Go for Big Data

Implementation of HyperLogLog and Count-Min Sketch in Go: code, benchmarks, comparison. Estimating uniqueness and frequencies with minimal memory for data streams. For middle/senior devs.