Github user dbtsai commented on a diff in the pull request:
https://github.com/apache/spark/pull/6388#discussion_r31874792
--- Diff:
mllib/src/main/scala/org/apache/spark/mllib/stat/MultivariateOnlineSummarizer.scala
---
@@ -58,13 +93,13 @@ class MultivariateOnlineSummarizer extends
MultivariateStatisticalSummary with S
require(sample.size > 0, s"Vector should have dimension larger than
zero.")
n = sample.size
--- End diff --
having
```scala
val withMean = configure("mean")
val withVariance = configure("variance")
if (withMean || withVariance)
...
```
Since it's `val`, JIT can kick in for optimization.
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