Adrien Grand created LUCENE-7377:
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Summary: Remove ClassicSimilarity?
Key: LUCENE-7377
URL: https://issues.apache.org/jira/browse/LUCENE-7377
Project: Lucene - Core
Issue Type: Task
Reporter: Adrien Grand
Priority: Minor
ClassicSimilarity was relying on coordination factors in order to produce good
scores. Now that coords are gone, it is quite a bad option compared to eg.
BM25Similarity.
Maybe we should remove ClassicSimilarity entirely in master and deprecated in
6.x in order to encourage users to move to BM25Similarity rather than stay on a
Similarity impl of lesser quality?
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