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Backdrifting · Mar 20, 2023

HyperLogLog: Counting Without Counters

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HyperLogLog: Counting Without Counters Posted 3/20/2023 I recently learned about HyperLogLog , which feels like cursed counter-intuitive magic, so I am eager to share. The Task We want to count unique items, like “how many unique words appear across all books at your local library?” or “how many unique Facebook users logged in over the past month?” For a small set of unique tokens, like counting…

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