Perfomance of BM25Retrieval vs EmbeddingRetrieval for Semantic Search

[thirtyninetythree]

Which one performs better? (in terms of relevancy of result.)

[anakin87]

Hello!

You should read this part of the Haystack docs, which compares sparse retrieval (BM25) and dense retrieval (EmbeddingRetrieval).

There is no absolute answer.
It depends on several factors:

• focus on precision vs recall
• availaible computational power
• speed at query time
• ...