warpt-ctc vs. MLlib

warpt-ctc is a loss function useful for performing supervised learning on sequence data, without needing an alignment between input data and labels that can be used to train end-to-end systems for speech recognition

MLlib is Spark's machine learning (ML) library that make practical machine learning scalable and easy it provides ML Algorithms: common learning algorithms such as classification, regression, clustering, and collaborative filtering, feature extraction, transformation, dimensionality reduction, and selection, tools for constructing, evaluating, and tuning ML Pipelines, saving and load algorithms, models, and Pipelines and linear algebra, statistics, data handling, etc.