Github user YanTangZhai commented on a diff in the pull request:
https://github.com/apache/spark/pull/3539#discussion_r21140476
--- Diff: core/src/main/scala/org/apache/spark/rdd/HadoopRDD.scala ---
@@ -238,10 +238,13 @@ class HadoopRDD[K, V](
val value: V = reader.createValue()
var recordsSinceMetricsUpdate = 0
+ var startTime : Long = 0L
override def getNext() = {
try {
+ startTime = System.nanoTime
finished = !reader.next(key, value)
+ inputMetrics.readTime += (System.nanoTime - startTime)
--- End diff --
Oh sorry. It may be expensive. Let me think about it. Thanks.
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