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bench: isolate Partial aggregation gains without Final buckets (do not merge) - #26081

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Rachelint wants to merge 16 commits into

apache:mainfrom

Rachelint:codex/ablation-partial-new-no-final-buckets

Commits on Sep 25, 2026

feat: aggregate large final hash tables as hash buckets (experimental, off by default)
jayzhan211
committed
4daca18
feat: flush a partial hash aggregation table that reaches the bucket threshold while its groups do not recur
jayzhan211
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0ba8308
perf: reuse one hash table across aggregation buckets and skip compacting buckets of unique groups
jayzhan211
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efa8dde
refactor: move the aggregation bucket driver into its own module
jayzhan211
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f91b6ba
perf: move a final table of unique groups into buckets at a quarter of the threshold
jayzhan211
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2cf0fe9
perf: let the table of an aggregation bucket keep its group keys where its input holds them
jayzhan211
committed
f9df89e

Commits on Oct 2, 2026

perf: route final aggregate buckets by column

Rachel Int
authored and
Rachel Int
committed
b964422

Commits on Oct 4, 2026

perf: benchmark 32 aggregate buckets without compaction

Rachel Int
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Rachel Int
committed
313a3a9
perf: scatter StringView columns into aggregate buckets

Rachel Int
authored and
Rachel Int
committed
085c221
perf: retain gather when scattering StringView bucket ranges

Rachel Int
authored and
Rachel Int
committed
cf6819d

Commits on Oct 6, 2026

perf: increase final aggregation fanout to 128 buckets
Rachelint
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33aad7a
perf: increase final aggregation fanout to 256 buckets
Rachelint
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df55545
perf: bound partial aggregation working sets

Rachel Int
authored and
Rachel Int
committed
efd384f
bench: disable final bucketing for partial policy baseline
Rachelint
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126109f
bench: isolate partial working-set optimization without final buckets
Rachelint
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70ac2ee
bench: make both ablation refs reachable by benchmark runner
Rachelint
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2a661dc