rxin edited a comment on issue #25024: [SPARK-27296][SQL] User Defined Aggregators that do not ser/de on each input row URL: https://github.com/apache/spark/pull/25024#issuecomment-509327503 Can you look into how this actually works under the hood? The code is still doing serialization, so it doesn't really make sense to me that it is significantly faster vs the existing UDAF. I also find it very weird to have two UDAF interfaces that look very similar. Would be great if we can fix the old one.
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