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https://issues.apache.org/jira/browse/SPARK-15240?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-15240:
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Assignee: Apache Spark
> Use buffer variables for update/merge expressions instead duplicate
> serialization/deserialization
> -------------------------------------------------------------------------------------------------
>
> Key: SPARK-15240
> URL: https://issues.apache.org/jira/browse/SPARK-15240
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Reporter: Liang-Chi Hsieh
> Assignee: Apache Spark
>
> We do serialization/deserialization on aggregation buffer in
> TungstenAggregate for each aggregation function. It wastes time on duplicate
> serde for the same grouping keys. We can optimize it.
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