Topic
ranking
2 posts
- Retrieval10 min
A perfect title match had to be popular to count
Hybrid search ranking where retrieval could contribute at most 0.2030 toward a 0.25 cutoff. An exact title match survived only when the product was also popular enough.
- Retrieval11 min
Fusing two rankers made routing worse, and the reason is structural
Reciprocal rank fusion made routing worse: one signal covered every repository, the other 17 of 28, and RRF punished exactly the repositories the second could not see.