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https://issues.apache.org/jira/browse/HIVE-9574?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14314742#comment-14314742
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Xuefu Zhang commented on HIVE-9574:
-----------------------------------
+1
> Lazy computing in HiveBaseFunctionResultList may hurt performance [Spark
> Branch]
> --------------------------------------------------------------------------------
>
> Key: HIVE-9574
> URL: https://issues.apache.org/jira/browse/HIVE-9574
> Project: Hive
> Issue Type: Sub-task
> Components: Spark
> Reporter: Rui Li
> Assignee: Jimmy Xiang
> Fix For: spark-branch
>
> Attachments: HIVE-9574.1-spark.patch, HIVE-9574.2-spark.patch,
> HIVE-9574.3-spark.patch, HIVE-9574.4-spark.patch, HIVE-9574.5-spark.patch,
> HIVE-9574.6-spark.patch
>
>
> {{RowContainer.first}} may call {{InputFormat.getSplits}}, which is
> expensive. If we switch {{container}} and {{backupContainer}} frequently in
> {{HiveKVResultCache}}, it will downgrade performance.
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