zhengruifeng opened a new pull request #27360: [SPARK-30642][ML][PYSPARK] LinearSVC blockify input vectors URL: https://github.com/apache/spark/pull/27360 ### What changes were proposed in this pull request? 1, stack input vectors to blocks (like ALS/MLP); 2, add new param `blockSize` 3, standardize the input outside of optimization procedure; ### Why are the changes needed? 1, reduce RAM to persist traing dataset; (save ~40% in test) 2, use Level-2 BLAS routines; (12% ~ 28% faster, without native BLAS) ### Does this PR introduce any user-facing change? a new param `blockSize` ### How was this patch tested? existing and updated testsuites
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