tustvold commented on issue #2270:
URL: https://github.com/apache/arrow-rs/issues/2270#issuecomment-1201834760

   > Interesting, when is this the case? Would there be situations where the 
decoder couldn't optimize based on the number of values to skip?
   
   It needs to be benchmarked but with the exception of PLAIN encoded 
primitives, skipping over values still requires reading block headers, 
interpreting them, etc... and so isn't without cost. If you're then reading 
very small slices the dispatch overheads will start to add up.


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