caican created SPARK-40170:
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Summary: 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: 3.3.0
Reporter: caican
Attachments: image-2022-08-22-10-56-54-768.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.
!image-2022-08-22-10-51-07-542.png!
!image-2022-08-22-10-56-04-574.png!
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