How count-min sketches work – frequencies, but without the actual data

Hacker NewsWednesday, October 22, 2025 at 4:27:26 PM
NeutralTechnology
Count-min sketches are a fascinating data structure that allows for the estimation of frequencies of events without storing the actual data. This technique is particularly useful in scenarios where memory efficiency is crucial, enabling quick approximations of data trends. Understanding how these sketches work can help in various fields, from data analysis to network traffic monitoring, making it a valuable concept for anyone interested in data science.
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