Github user jegonzal commented on the pull request: https://github.com/apache/spark/pull/3099#issuecomment-61922586 The model serving work would really benefit from being able to evaluate models without requiring a Spark context especially since we are shooting for 10s millisecond latencies. Though more generally, we should think about how one might want to use the artifact of the pipeline. I suspect their are uses that may exist outside of Spark and the extent to which the models themselves are "portable functions" could enable greater adoption.
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