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Retrieval & EmbeddingsHard· Quantization· Binary Quantization
How does Binary Quantization (BQ) compare to Product Qu...
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See plansBinary Quantization (BQ) fixes its cells as the orthants of the space, meaning it requires no training and is immune to corpus shift. PQ, conversely, fits k-means to the actual data density. If your system includes a full-precision rescoring stage, the first stage only needs to produce a high-quality shortlist. BQ’s computational efficiency (popcount) allows for a deeper scan at the same latency, which can often outperform PQ in that specific role.