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perf: spill every shuffle partition of a task into one file - #5916

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peterxcli wants to merge 8 commits into
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peterxcli:perf/shuffle-single-spill-file-per-round
Draft

perf: spill every shuffle partition of a task into one file#5916
peterxcli wants to merge 8 commits into
apache:mainfrom
peterxcli:perf/shuffle-single-spill-file-per-round

perf: buffer spill writes across partitions

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succeeded Sep 14, 2026 in 9m 41s