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Introducing PartitionedVector#1596

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yingsu00 wants to merge 1 commit intoIBM:oss-mainfrom
yingsu00:PartitionedOutput1.0
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Introducing PartitionedVector#1596
yingsu00 wants to merge 1 commit intoIBM:oss-mainfrom
yingsu00:PartitionedOutput1.0

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This commit is the first PR for optimized PartitionedOutput. It introduces the PartitionedVector, in which the values are partitioned according to a given partitionId list. It uses in place swapping algorithm and has very high throughput. It can also be used in aggregation, sorting, etc.

@yingsu00 yingsu00 requested a review from xin-zhang2 January 14, 2026 08:06
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