Slides https://github.com/keypointt/reading/blob/master/spark/2017_spark_spring_SF_Databricks_spark_memory.pdf note Future work to track SPARK-19489: Stable serialization format for external & native code integration. SPARK-15689: Data source API v2 SPARK-15687: Columnar execution engine Reference: https://www.youtube.com/watch?v=-Aq1LMpzaKw&feature=youtu.be