Coffee Break #18

• https://martin.atlassian.net/wiki/spaces/lestermartin/blog/2016/05/19/67043332/why+spark+s+mapPartitions+transformation+is+faster+than+map+calls+your+function+once+partition+not+once+element — Speed comparison between Apache Spark map() and mapPartitions().
• https://databricks.com/blog/2018/02/28/introducing-apache-spark-2-3.html — Apache Spark 2.3 on DataBricks.
• https://scala-lang.org/blog/2018/03/19/accessible-scala.html — What Stephen Hawking would say about scalac.