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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/07/06 19:45:36 UTC
[GitHub] [spark] erikerlandson commented on issue #25024: [SPARK-27296][SQL]
User Defined Aggregators that do not ser/de on each input row
erikerlandson commented 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-508949525
@rxin I wrote up my benchmarking results above, under "how was this patch tested" For an aggregator with non-trivial ser/de, the improvement can be two orders of magnitude, but is less for more simple aggregators.
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