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https://issues.apache.org/jira/browse/SPARK-55318?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-55318.
---------------------------------
Resolution: Fixed
Issue resolved by pull request 54097
[https://github.com/apache/spark/pull/54097]
> Performance Optimizations for vector_sum, vector_avg
> ----------------------------------------------------
>
> Key: SPARK-55318
> URL: https://issues.apache.org/jira/browse/SPARK-55318
> Project: Spark
> Issue Type: New Feature
> Components: SQL
> Affects Versions: 4.2.0
> Reporter: Zhidong Qu
> Assignee: Zhidong Qu
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.2.0
>
>
> Implement a set of performance optimizations for the vector aggregation
> functions recently added.
> * Reuse binary buffer in-place: instead of allocating a new ByteBuffer for
> each update/merge call
> * Hoist division out of loop: compute invCount = 1.0f / newCount once before
> the loop instead of dividing per element
> * Hoist weight calculations out of loop: compute leftWeight and rightWeight
> once before the loop instead of 2 divisions per element
> * Skip null checks when unnecessary: Check ArrayType.containsNull at
> initialization and skip the per-element null check entirely when the array
> type cannot contain nulls
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