zhengruifeng opened a new pull request #27427: [SPARK-30700][ML] NaiveBayesModel predict optimization URL: https://github.com/apache/spark/pull/27427 ### What changes were proposed in this pull request? var `negThetaSum` is always used together with `pi`, so we can add them at first ### Why are the changes needed? only need to add one var `piMinusThetaSum`, instead of `pi` and `negThetaSum` ### Does this PR introduce any user-facing change? No ### How was this patch tested? existing testsuites
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