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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2021/10/13 01:44:00 UTC

[jira] [Created] (SPARK-36992) Improve byte array sort perf by unify getPrefix function of UTF8String and ByteArray

XiDuo You created SPARK-36992:
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             Summary: Improve byte array sort perf by unify getPrefix function of UTF8String and ByteArray
                 Key: SPARK-36992
                 URL: https://issues.apache.org/jira/browse/SPARK-36992
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: XiDuo You


When execute sort operator, we first compare the prefix. However the getPrefix function of byte array is slow. We use first 8 bytes as the prefix, so at most we will call 8 times with `Platform.getByte` which is slower than call once with `Platform.getInt` or `Platform.getLong`.



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