eatoncys opened a new pull request #24238: [SPARK-27320][SQL]Converting seq to array in AggregationIterator to improve its access performance URL: https://github.com/apache/spark/pull/24238 ## What changes were proposed in this pull request? In AggregationIterator's loop function, we access the expressions by `expressions(i)`, the type of `expressions` is `::`, a subtype of list. This PR coverts `expressions` to array to improve its access performance. ## How was this patch tested? Existing tests.
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