⚡ Bolt: 데이터 프레임 변환(as.data.frame) 생략으로 O(N) 메모리 할당 방지 - #350
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R에서 열 개수를 세기 위해 행렬을 `as.data.frame()`으로 변환하면 불필요한 O(N) 메모리 할당과 복사 오버헤드가 발생합니다. `ncol()`은 행렬을 기본적으로 지원하므로, 성능 향상을 위해 대상 객체에 직접 호출해야 합니다.
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자동 정리: base 대비 실제 변경(diff)이 0건이라 이 PR을 닫습니다. 변경을 추가한 뒤 reopen하세요. |
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Final no-valid-delta disposition — 2026-09-09
master@f87c2324f1686135e57d8730c1b0b9420874f30046d2568b9eda94641e70ad98777c88546dc1f12eReview finding
The proposed source change replaced
ncol(as.data.frame(x))withncol(x)for already-admitted matrix/data-frame inputs and added a repository note claiming O(N) → O(1) allocation/runtime improvement. The only cited measurement wastestthat::test_local(), which is correctness regression evidence rather than performance evidence.No representative/right-cleared
autoFIPCworkload, protected-vs-candidate benchmark in the same harness, warm-up/repetition policy, median/p95, allocation/GC profile, or CPU profile was supplied. The PR also added no new behavioral regression or scientific/numerical contract that depends on the changed expression. The broad.jules/bolt.mdrule (“절대 as.data.frame()으로 먼저 변환하지 마십시오”) is likewise not justified by the evidence in this PR.Ordinary descendant
46d2568b9eda94641e70ad98777c88546dc1f12epreserves the original optimization commit in ancestry and restores the exact protectedmastertree. No force push or destructive rebase was used. Fresh comparison to protectedmasterreports merge base exactlyf87c2324..., ahead 2, behind 0, andfiles=[].There is therefore no production code, test, fixture, scientific contract, documentation, or reusable evidence delta left to integrate. This PR is intentionally closed unmerged, not treated as delivered.
A future performance change in this path should first identify a representative product workload and measured bottleneck, compare protected and candidate implementations in the same R/runtime environment, preserve numerical/IRT behavior, and report repeated latency plus allocation/GC evidence. Existing correctness tests remain necessary but are not a performance benchmark.
No self-approval, force push, destructive rebase, synthetic status, gate weakening, predecessor-GREEN transfer, or source-neutral workflow retrigger was used.