Refresh the benchmark suite and implement low hanging performance fixes (AI driven PR) - #511

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KristofferC wants to merge 16 commits into

kc/low_hanging_fruits

Commits on Aug 12, 2026

Modernize the benchmark harness
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3e33ad8
Make BlockKron axes allocation-free
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Merge sorted block boundaries linearly
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c9cd60f
Make khatri_rao type-stable
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90b126b
Delegate BlockedArray broadcasts to parent storage
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0c1f10b
Broadcast matching arrays by N-dimensional blocks
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b95da7f
Reduce BlockArray sums per stored block
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893b59c
Compute BlockArray 2-norm from block norms
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c75e9d1
Keep sorted boundary merging with axis helpers
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d1df6b5
Keep matching block-axis combination inferred
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dc8f97c
Route plain BlockArray sums through mapreduce
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Route mapped BlockArray sums through mapreduce
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Specialize BlockArray norm2
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Use Base sum delegation
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d0cd82d
Skip empty blocks in mapped sums
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6bf445d
Preserve nonfinite BlockArray norm semantics
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aa4f109