[GitHub] HyukjinKwon commented on a change in pull request #23727: [SPARK-26817][CORE] Use System.nanoTime to measure time intervals

[GitBox <gi...@apache.org>]

HyukjinKwon commented on a change in pull request #23727: [SPARK-26817][CORE] Use System.nanoTime to measure time intervals
URL: https://github.com/apache/spark/pull/23727#discussion_r253342972
 
 

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 File path: core/src/main/scala/org/apache/spark/MapOutputTracker.scala
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 @@ -744,7 +744,7 @@ private[spark] class MapOutputTrackerWorker(conf: SparkConf) extends MapOutputTr
         }
       }
       logDebug(s"Fetching map output statuses for shuffle $shuffleId took " +
-        s"${System.currentTimeMillis - startTime} ms")
+        s"${System.nanoTime() - startTime} ns")
 
 Review comment:
   agree with this take.

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