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spring-ai/rerank/output/07-latency-against-quality.txt

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# Quality and added latency for each setting (60 questions; latency is the median of 12 calls)
machine: 2 vCPU, JDK 25.0.5
first stage (embed the question, compare with 94 vectors): median 3.8 ms
setting hit@1 hit@3 hit@5 MRR@10 rerank ms (median)
no reranker 41/60 51/60 55/60 0.782 0
fp32, top 5 48/60 55/60 55/60 0.863 70
int8, top 5 48/60 55/60 55/60 0.860 68
fp32, top 10 49/60 54/60 56/60 0.868 116
int8, top 10 49/60 54/60 56/60 0.868 106
fp32, top 20 49/60 55/60 56/60 0.870 199
int8, top 20 49/60 55/60 56/60 0.870 197
fp32, top 50 49/60 56/60 56/60 0.869 461
int8, top 50 49/60 56/60 56/60 0.869 503
int8 and fp32 put the same passage first for 58 of 60 questions (top 50)