zhengruifeng opened a new pull request #26767: [SPARK-29914][ML][FOLLOWUP] CountVectorizer del big attribute array URL: https://github.com/apache/spark/pull/26767 ### What changes were proposed in this pull request? CountVectorizer del big attribute array ### Why are the changes needed? Previous discussion is [here](https://github.com/apache/spark/pull/26547) > vocabulary is a big number, for example 1 << 18 by default. We will keep a big attribute array here. ### Does this PR introduce any user-facing change? No ### How was this patch tested? existing testsuites
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