jimczi commented on PR #16705:
URL: https://github.com/apache/lucene/pull/16705#issuecomment-5814079409

   A few more places where prefetch silently does nothing:
   
   - `OffHeapFloat16VectorValues` has no prefetch at all, while fp32 and byte 
do and the layout is the same. So `ScalarQuantizedFloat16VectorValues` now 
forwards into a no-op and the fp16 rescore stays as it was.
   - `ExitableDirectoryReader` wraps the three vector values and forwards 
everything except prefetch, so a search with a timeout loses it with no signal.
   - Same in `SortingCodecReader`, though that one only matters on the 
sort/merge path.
   
   Maybe worth a test that checks each wrapper forwards, this keeps coming back.
   


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