Yang Wang created SPARK-15875:
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Summary: Avoid using Seq.length == 0 and Seq.lenth > 0. Use
Seq.isEmpty and Seq.nonEmpty instead.
Key: SPARK-15875
URL: https://issues.apache.org/jira/browse/SPARK-15875
Project: Spark
Issue Type: Improvement
Affects Versions: 2.0.0
Reporter: Yang Wang
Priority: Minor
In scala, immutable.List.length is an expensive operation so we should
avoid using Seq.length == 0 and Seq.lenth > 0 and use Seq.isEmpty and
Seq.nonEmpty instead.
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