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... per key My humble opinion is that avoiding allocations in this performance-critical section is worth the extra code. Author: Sandy Ryza <sandy@cloudera.com> Closes #1461 from sryza/sandy-spark-2553 and squashes the following commits: 7eaf7f2 [Sandy Ryza] SPARK-2553. CoGroupedRDD unnecessarily allocates a Tuple2 per dependency per key |
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