mikemccand commented on PR #13585:
URL: https://github.com/apache/lucene/pull/13585#issuecomment-2246348961

   > Also I noticed we would sometimes decode the same block of positions 
multiple times when it's shared by two doc blocks (because when moving to the 
next doc block we reset the position FP to the start of the pos block and 
decode them again, while they were already decoded, it looks like it's an 
existing issue in Lucene99 too), but fixing it only yielded a minor speedup.
   
   Egads!  That must be a longstanding performance bug.


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