Github user rxin commented on the pull request:
https://github.com/apache/spark/pull/1208#issuecomment-47067625
To be honest, my scar from the incident (deprecating Scala 2.10 support
before Scala 2.11 was even released) hasn't fully recovered. Do we gain
anything by moving onto this logging API? There is a tiny teeny performance
boost, but I don't think we log any hot code path in spark-core.
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