Josh Rosen created SPARK-6079:
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Summary: Use index to speed up StatusTracker.getJobIdsForGroup()
Key: SPARK-6079
URL: https://issues.apache.org/jira/browse/SPARK-6079
Project: Spark
Issue Type: Improvement
Components: Spark Core
Reporter: Josh Rosen
Assignee: Josh Rosen
Priority: Minor
Fix For: 1.4.0
{{StatusTracker.getJobIdsForGroup()}} is implemented via a linear scan over a
HashMap rather than using an index. This might be an expensive operation if
there are many (e.g. thousands) of retained jobs. We can add a new index to
speed this up.
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