feat(v1): CSR-backed sparse groupby-sum - skew-independent build memory (6-9x on the #745 hub case) - #870

Merged

FabianHofmann merged 8 commits into

feat/v1-sparse-groupby

Sep 4, 2026

Commits on Sep 4, 2026

proto: deferred groupby-sum realized directly as CSRConstraint

authored and
FabianHofmann
committed
8a2e393
feat(v1): lazy groupby-sum with direct CSR realization under freeze

authored and
FabianHofmann
committed
a0f54a4
feat(v1): CSR-backed sparse groupby-sum (payload swap from lazy recipe)

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FabianHofmann
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2afbe17
bench(patterns): sparse sibling for nodal_balance; drop dev-script repro

authored and
FabianHofmann
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7961236
refactor: condense sparse-groupby code and docs

authored and
FabianHofmann
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a20b4e6
fix(csr): keep zero-coefficient rows active, fail fast on unsupported sparse=True, type-check clean
FabianHofmann
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fd9f4b5
refactor(sparse): scope payload module to the expression layer, realize constraints via CSRConstraint.from_payload
FabianHofmann
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951fdf3
refactor(sparse): tidy naming and cohesion in the sparse layer
FabianHofmann
committed
13f6681