https://sudonull.com/clickhouse-aggregate-functions-uniqhll12-quantiletdigest-topk
uniqHLL12 for fast unique users, quantileTDigest for distributions, groupArray, topK, -If combinators. Examples of GGR, cohorts, retention.
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https://sudonull.com/llm-quantization-160gb-model-on-a-laptop
Learn how to quantize large LLMs to 4-bit without quality loss. Symmetric/asymmetric quantization, code, benchmarks. Run 80B models locally — developer guide.
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