HippoBaro commented on PR #11262:
URL: https://github.com/apache/arrow-rs/pull/11262#issuecomment-5965470822

   > One last thought...it would be nice to log a warning when legacy is 
detected.
   
   Agreed in principle. The crate currently depends on neither `log` nor 
`tracing`, though, and I couldn’t find any existing use of `stdout` or `stderr` 
either. I’d be hesitant to introduce a logging dependency or start printing 
directly. Seems like the wrong way to do it?  
   
   > the idea makes sense to me, I didnt take too close of a look but are there 
benchmarks that show the improvement here?
   
   This is a bug fix and isn’t expected to affect performance. I suppose 
routing FLBA dictionary inputs through the writer encoder backend could have 
some performance impact, but even if it turns out to be a net negative, 
correctness comes first.
   
   I’ll run the benchmarks to quantify it.


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