mayya-sharipova commented on PR #947:
URL: https://github.com/apache/lucene/pull/947#issuecomment-1156532534

   @msokolov Thanks for your work, this is a very exciting feature.  Really 
looking forward to it. Extra benefit – less disk space used for vector values.
   
   Overall, this PR looks very good to me. I just have several questions
   - During merging when writing a merged vector field it looks like we first 
expand vector values only to again to compress them later? Would be nice to 
avoid this.
   - Not sure if possible at this stage, but it would be nice if 
`HnswGraphBuilder` and `HnswGraphSearcher` were not aware of different 
calculations needed for different similarity functions, and refer all this 
calculations (dotProduct(BytesRef a..)) to `VectorSimilarityFunction`


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