Liang-Chi Hsieh created SPARK-4797:
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Summary: Replace breezeSquaredDistance
Key: SPARK-4797
URL: https://issues.apache.org/jira/browse/SPARK-4797
Project: Spark
Issue Type: Improvement
Reporter: Liang-Chi Hsieh
Priority: Minor
This PR replaces slow breezeSquaredDistance. A simple calculation involving
40000 vectors of 20000 dims shows:
* breezeSquaredDistance: ~12 secs
* This PR: ~10.5 secs
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