AngersZhuuuu opened a new pull request #24124: mapPartition to replace map to speedUp Dataset's toLocalIterator process URL: https://github.com/apache/spark/pull/24124 ## What changes were proposed in this pull request? For this change, it use mapPartitionsInternal method replace map method to speed up decode process to parallel execution https://issues.apache.org/jira/browse/SPARK-27185 ## How was this patch tested? Build project and run in our enviroment Please review http://spark.apache.org/contributing.html before opening a pull request.
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