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[jira] [Created] (ARROW-3694) [Java] Avoid superfluous string creation when logging level is disabled


Zhenyuan Zhao created ARROW-3694:
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             Summary: [Java] Avoid superfluous string creation when logging level is disabled 
                 Key: ARROW-3694
                 URL: https://issues.apache.org/jira/browse/ARROW-3694
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Java
    Affects Versions: 0.11.1
            Reporter: Zhenyuan Zhao
             Fix For: 0.12.0


There are a few places where strings were unnecessarily created for logging purpose.

[https://github.com/apache/arrow/blob/ed70f051bb0636d994f285c38503b992d08efa00/java/vector/src/main/java/org/apache/arrow/vector/ipc/message/ArrowRecordBatch.java#L75]

For the above scenario in ArrowRecordBatch, roughly 2/3 of the total CPU was spent in string.format()



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