[
https://issues.apache.org/jira/browse/SPARK-14351?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Apache Spark reassigned SPARK-14351:
------------------------------------
Assignee: (was: Apache Spark)
> Optimize ImpurityAggregator for decision trees
> ----------------------------------------------
>
> Key: SPARK-14351
> URL: https://issues.apache.org/jira/browse/SPARK-14351
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Joseph K. Bradley
>
> {{RandomForest.binsToBestSplit}} currently takes a large amount of time.
> Based on some quick profiling, I believe a big chunk of this is spent in
> {{ImpurityAggregator.getCalculator}} (which seems to make unnecessary Array
> copies) and {{RandomForest.calculateImpurityStats}}.
> This JIRA is for:
> * Doing more profiling to confirm that unnecessary time is being spent in
> some of these methods.
> * Optimizing the implementation
> * Profiling again to confirm the speedups
> Local profiling for large enough examples should suffice, especially since
> the optimizations should not need to change the amount of data communicated.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org
For additional commands, e-mail: issues-h...@spark.apache.org
