zhengruifeng commented on issue #26483: [SPARK-29823][MLLIB] Improper persist strategy in mllib.clustering.KMeans.run() URL: https://github.com/apache/spark/pull/26483#issuecomment-569591409 @srowen I agree that there should be somewhat perfermance improvement if RAM is big enough, at the cost of double caching. However if the RAM can not fit the two copies, I think this will hurt the perfermance. End uers are telled to cache the input RDD/DF for ML algorithms, and I think double caching matters more than this perfermance improvement. So I am against to this change.
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