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https://issues.apache.org/jira/browse/SPARK-46328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bowen Liang updated SPARK-46328:
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Summary: Allocate capacity by columns size for array list of TColumns in
TRowSet generation (was: Allocate enough capacity for assembling array list of
TColumns in TRowSet generation)
> Allocate capacity by columns size for array list of TColumns in TRowSet
> generation
> ----------------------------------------------------------------------------------
>
> Key: SPARK-46328
> URL: https://issues.apache.org/jira/browse/SPARK-46328
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.5.0
> Reporter: Bowen Liang
> Priority: Minor
>
> Background:
> ArrayList is created for TColumn value collections in RowSetUtils for TRowSet
> generation. Currently, they are created with Java's default capacity of 16,
> rather than by the number of columns, which could cause array copying in
> assembling each TColumn collections when the column number exceeds the
> default capacity.
>
> Suggested solution:
> Allocate enough capacity by columns size for assembling array list of
> TColumns in TRowSet generation.
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