Fun with Hyperloglog and Simd

Posted3 months ago

vaktibabat

9 points

1 comments

vaktibabat.github.ioTechstory

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HyperloglogSimdAlgorithm OptimizationData Structures

Key topics

Hyperloglog

Simd

Algorithm Optimization

Data Structures

The article explores the implementation and optimization of the HyperLogLog algorithm using SIMD instructions, sparking interest in the technical details and potential applications.

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01Story posted
Oct 4, 2025 at 6:44 AM EDT
3 months ago
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Oct 4, 2025 at 6:44 AM EDT
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vaktibabatAuthor

3 months ago

Wrote this project to learn about HyperLogLog, a random algorithm for estimating the cardinality of very large datasets using only a constant amount of memory (while introducing some small error). While writing the post, I've thought about optimizing the algorithm with SIMD, which ended up being a very interesting rabbit hole. I also benchmarked the implementation against some other Go, Rust, and Python.

No prior knowledge of either HyperLogLog or SIMD is required; any feedback on the post/code would be welcome!

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ID: 45472347Type: storyLast synced: 11/17/2025, 11:03:41 AM

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