walterddr commented on PR #9224:
URL: https://github.com/apache/pinot/pull/9224#issuecomment-1219819416

   is there a backward compatibility story for this change. 
   - if the header is broken but somehow the payload is ok. what's the behavior 
before/after this change
   - if header doesn't agree with the pre-process info, which one should we 
trust?
   - if payload doesn't agree with the pre-process info but align with header, 
which one should we trust?
   
   another question ii what's the performance cost of skipping headers vs 
parsing headers? do we have any benchmarks?


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