MaxGekk opened a new pull request #23858: Align Spark's TimSort to jdk11 implementation URL: https://github.com/apache/spark/pull/23858 ## What changes were proposed in this pull request? Spark's TimSort deviates from JDK 11 TimSort in a couple places: - `stackLen` was increased in jdk - additional cases for break in `mergeCollapse`: `n < 0` In the PR, I propose to align Spark TimSort to jdk implementation. ## How was this patch tested? By existing test suites, in particular, `SorterSuite`.
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