JkSelf commented on issue #25295: [SPARK-28560][SQL] Optimize shuffle reader to local shuffle reader when smj converted to bhj in adaptive execution URL: https://github.com/apache/spark/pull/25295#issuecomment-518092402 We have done the functionality and performance tests in 3TB TPC-DS. And the result is shown in [here](https://docs.google.com/spreadsheets/d/1jtT3tCiNjtUbjOelpf50w7Z5JNl2YhzrBnbpF-7EhTw/edit#gid=0). Q82 can show 1.76x performance improvement with this PR. And no queries have significant performance degradation. @carsonwang @@cloud-fan can you help review if you have available time? Thanks for your help.
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