People interested in perf and big data ETL for the JVM may want to check out DataVec: https://github.com/deeplearning4j/datavec https://github.com/deeplearning

People interested in perf and big data ETL for the JVM may want to check out DataVec: https://github.com/deeplearning4j/datavec https://github.com/deeplearning4j/datavec https://deeplearning4j.org/datavec https://deeplearning4j.org/datavec It vectorizes/tensorizes most major data types to put them in shape for machine learning. It also lets you save the data pipeline as a reusable object.