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## What changes were proposed in this pull request? In scala, immutable.List.length is an expensive operation so we should avoid using Seq.length == 0 or Seq.lenth > 0, and use Seq.isEmpty and Seq.nonEmpty instead. ## How was this patch tested? existing tests Author: wangyang <wangyang@haizhi.com> Closes #13601 from yangw1234/isEmpty. |
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