srowen commented on a change in pull request #27758: [SPARK-31007][ML] KMeans
optimization based on triangle-inequality
URL: https://github.com/apache/spark/pull/27758#discussion_r386461703
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File path: mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
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@@ -266,30 +266,35 @@ class KMeans private (
var converged = false
var cost = 0.0
var iteration = 0
+ var totalRadiiTime = 0L
val iterationStartTime = System.nanoTime()
instr.foreach(_.logNumFeatures(centers.head.vector.size))
// Execute iterations of Lloyd's algorithm until converged
while (iteration < maxIterations && !converged) {
+ val radiiStartTime = System.nanoTime()
Review comment:
You might remove this after testing; it's not super important.
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