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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/05/28 09:47:33 UTC
[GitHub] [spark] zhengruifeng opened a new pull request #24727:
[SPARK-27867][ML] RegressionEvaluator cache lastest RegressionMetrics to
avoid duplicated computation
zhengruifeng opened a new pull request #24727: [SPARK-27867][ML] RegressionEvaluator cache lastest RegressionMetrics to avoid duplicated computation
URL: https://github.com/apache/spark/pull/24727
## What changes were proposed in this pull request?
cache the lastest `RegressionMetrics`, so that in the next calls if the inputs (except metricName) are not changed, the metric can be directly returned from the internal `RegressionMetrics`
## How was this patch tested?
existing tests and local test in spark-shell
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