Recall practical tradeoffs among exact search, HNSW search effort, quantization, and memory constraints.
What is exact search best for? Think reference set. Use exact search as a quality baseline on samples or small corpora. It compares against every vector, so it helps estimate ANN recall, but may be too slow or costly for large production traffic. Higher search effort vs lower search effort Tradeoff Pick the lowest effort that meets the paired recall-latency SLO. Objection: 'Just lower candidate count; users want speed.' Battlecard Latency pressure is real, but relevance complaints are also active. Your line We can test lower candidate count, but it has to keep recall above the launch guardrail on the…
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