Github user lgieron commented on a diff in the pull request: https://github.com/apache/spark/pull/13264#discussion_r64545642 --- Diff: core/src/main/scala/org/apache/spark/ui/storage/StorageTab.scala --- @@ -59,7 +59,15 @@ class StorageListener(storageStatusListener: StorageStatusListener) extends Bloc override def onStageSubmitted(stageSubmitted: SparkListenerStageSubmitted): Unit = synchronized { val rddInfos = stageSubmitted.stageInfo.rddInfos - rddInfos.foreach { info => _rddInfoMap.getOrElseUpdate(info.id, info) } + rddInfos.foreach { info => --- End diff -- OK I'm changing this. I'm not a fan of slower code in favor of brevity (as my impression is that, over time, the entire code base just becomes slow and fixing a couple bottlenecks won't necessarily help things), but it's the in the general spirit of Scala (brevity over speed) so my one optimization would be meaningless anyway.
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