zhengruifeng commented on issue #26396: [SPARK-29754][ML] LoR/AFT/LiR/SVC use Summarizer instead of MultivariateOnlineSummarizer URL: https://github.com/apache/spark/pull/26396#issuecomment-549776670 According to the performance test result in https://github.com/apache/spark/pull/26393, `ml.SummarizerBuffer` maybe faster than `mllib.MultivariateOnlineSummarizer`. However, since the proportion of summary computation is relatively small in the whole training, I do not test whether it is faster than old impls.
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