maropu commented on issue #25299: [SPARK-27651][Core] Avoid the network when shuffle blocks are fetched from the same host URL: https://github.com/apache/spark/pull/25299#issuecomment-520097741 just FYI: I remember there was the similar work for this improvement a few years ago: SPARK-6521(https://github.com/apache/spark/pull/9478). We closed the ticket cuz [we didn't get actual performance gains](https://github.com/apache/spark/pull/9478#issuecomment-160057949). Anyway, I added a link to it in the jira.
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