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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2019/03/20 02:03:35 UTC

[GitHub] [spark] srowen commented on issue #24124: [SPARK-27186][SQL] mapPartition to replace map to speedUp Dataset's toLocalIterator process

srowen commented on issue #24124: [SPARK-27186][SQL] mapPartition to replace map to speedUp Dataset's toLocalIterator process
URL: https://github.com/apache/spark/pull/24124#issuecomment-474654550
 
 
   That isn't what happens though. toLocalIterator evaluates partitions one by one. Unless you have more info or benchmarks to verify this, this should be closed.

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