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https://issues.apache.org/jira/browse/SPARK-5738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yin Huai updated SPARK-5738:
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Summary: Reuse mutable row for each record at jsonStringToRow (was: [SQL]
Reuse mutable row for each record at jsonStringToRow)
> Reuse mutable row for each record at jsonStringToRow
> ----------------------------------------------------
>
> Key: SPARK-5738
> URL: https://issues.apache.org/jira/browse/SPARK-5738
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 1.3.0
> Reporter: Yanbo Liang
>
> Other table scan like operations include ParquetTableScan, HiveTableScan use
> a reusable mutable row for seralization to decrease garbage. We also make
> JSONRelation#buildScan() with this optimization.
> When serialize json string to row, reuse a mutable row for both each record
> and inner nested structure instead of creating a new one for each.
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