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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