Dandandan commented on PR #23492:
URL: https://github.com/apache/datafusion/pull/23492#issuecomment-5191156983

   Also https://github.com/apache/datafusion/pull/24086 from @adriangb has some 
interesting experiments.
   
   Some other thoughts:
   
   * The interaction with filter pushdown is interesting - what is the best way 
to avoid serialization behind a large number of row filters while also 
minimizing bandwidth / decoding usage? The current implementation just plans 
the filters serially (`f1 -> f2 -> f3 -> f4 -> ... -> full projection`) without 
considering IO latency.
   * Should we just configure a fixed budget or should we do something with 
bandwidth?


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