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Posted to issues@spark.apache.org by "caican (Jira)" <ji...@apache.org> on 2022/08/22 02:57:00 UTC

[jira] [Created] (SPARK-40170) StringCoding UTF8 decode slowly

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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