Dongjoon Hyun created SPARK-53214:
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Summary: Use Java `HexFormat` instead of `Hex.encodeHexString`
Key: SPARK-53214
URL: https://issues.apache.org/jira/browse/SPARK-53214
Project: Spark
Issue Type: Sub-task
Components: k8s, Spark Core, SQL
Affects Versions: 4.1.0
Reporter: Dongjoon Hyun
Java native method is roughly **2x** faster.
{code}
scala> val a = new Array[Byte](1_000_000_000)
scala> spark.time(org.apache.commons.codec.binary.Hex.encodeHexString(a,
false).length)
Time taken: 1559 ms
val res0: Int = 2000000000
scala> spark.time(java.util.HexFormat.of().withUpperCase().formatHex(a).length)
Time taken: 672 ms
val res1: Int = 2000000000
{code}
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