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https://issues.apache.org/jira/browse/SPARK-40170?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen resolved SPARK-40170.
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Resolution: Invalid
> StringCoding UTF8 decode slowly
> -------------------------------
>
> Key: SPARK-40170
> URL: https://issues.apache.org/jira/browse/SPARK-40170
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.2, 3.2.0, 3.1.3, 3.2.1, 3.3.0, 3.2.2, 3.3.1
> Reporter: caican
> Priority: Major
> Attachments: image-2022-08-22-10-56-54-768.png,
> image-2022-08-22-10-57-11-744.png
>
>
> When `UnsafeRow` is converted to `Row` at
> `org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificSafeProjection.createExternalRow
> `, UTF8String decoding and copyMemory process are very slow.
> Does anyone have any ideas for optimization?
> !image-2022-08-22-10-56-54-768.png!
>
> !image-2022-08-22-10-57-11-744.png!
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