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Inference & ServingMedium· Reranking· Sliding Window· Ranking Algorithms
Why does the sliding window in a listwise reranker star...
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See plansThe choice is structural rather than empirical. Sliding head-first commits the top ranks early, which prevents documents from the tail from rising to the top. Sliding tail-first allows documents to ‘bubble up’ through successive windows, ensuring that a document at rank 100 has a path to reach rank 1. This is a structural necessity for effective listwise reranking.