Derrick Burns created SPARK-3424:
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Summary: KMeans Plus Plus is too slow
Key: SPARK-3424
URL: https://issues.apache.org/jira/browse/SPARK-3424
Project: Spark
Issue Type: Improvement
Components: MLlib
Affects Versions: 1.0.2
Reporter: Derrick Burns
The KMeansPlusPlus algorithm is implemented in time O( m k^2), where m is the
rounds of the KMeansParallel algorithm and k is the number of clusters.
This can be dramatically improved by maintaining the distance the closest
cluster center from round to round and then incrementally updating that value
for each point. This incremental update is O(1) time, this reduces the running
time for K Means Plus Plus to O( m k ). For large k, this is significant.
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