wgtmac commented on PR #9628:
URL: https://github.com/apache/arrow-rs/pull/9628#issuecomment-4159549684

   Coming from the dev list. The parquet-java implementation tried to optimize 
the disk size by creating multiple bloom filter writers with different NDVs and 
choosing the best in the end. The approach in this PR looks more elegant and 
worth porting to other implementations.


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