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refactor(response-data): simplify distinct non-missing category counts - #343

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bolt-na-omit-optimization-17863979538913219542
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refactor(response-data): simplify distinct non-missing category counts#343
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bolt-na-omit-optimization-17863979538913219542

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@seonghobae seonghobae commented Sep 6, 2026

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응답 범주의 고유한 비결측값 개수를 계산하는 두 production call site를 stats::na.omit() 기반 표현에서 sum(!is.na(unique(x)))로 단순화합니다. 대상은 R/aFIPC.R의 common-item response-category guard와 R/surveyFA.R의 non-constant response-column admission입니다.

최초 후보에는 이 두 변경과 무관한 .Rbuildignore, .markdownlint.json, .jules/bolt.md 등 packaging·lint·repository-wide 성능 교리가 섞여 있었습니다. protected master@f87c2324f1686135e57d8730c1b0b9420874f300 tree를 기준으로 normal descendant 34b3a893b23661b220ddd72bb5d173051c2f4456에서 그 범위를 걷어내고 두 production R 파일만 유지했습니다. history는 보존했고 force update는 사용하지 않았습니다.

scientific behavior를 먼저 고정했습니다. tests/testthat/test-optimization-equivalence.R@29a465f6d478cedbf9a48edc70fb296ecee6c14f는 dichotomous, constant, NA, NaN, 다범주 응답에서 후보 sum(!is.na(unique(x))), 직전 표현 length(stats::na.omit(unique(x))), 기존 category-count 표현 length(levels(as.factor(x)))이 독립적으로 적은 기대 범주 수와 같음을 검증합니다. common-item linking과 surveyFA 변수 admission의 response-category cardinality를 성능 refactor가 바꾸지 않는 것이 merge invariant입니다.

이 PR은 현재 속도·메모리 개선을 완료 근거로 주장하지 않습니다. tests/covr 통과는 correctness evidence이지 performance measurement가 아닙니다. 성능 효과를 주장하려면 동일 R/toolchain/hardware에서 representative/right-cleared autoFIPC·surveyFA workload의 실제 production path를 protected-vs-candidate로 비교하고, workload cardinality·warm-up·반복 분포·allocation/GC/profile·과학적 결과 동일성과 buyer-visible effect를 함께 남겨야 합니다. material benefit이 없다면 더 단순한 protected 표현을 유지하는 선택도 열어 둡니다.

Draft를 유지합니다. Ready/merge acceptance는 exact-head package tests와 coverage, Security/SAST/CodeQL, current-head review thread 0, qualifying independent current-head review이며, psychometric 결과의 category-count invariant가 우선입니다.

💡 What: `stats::na.omit`을 활용한 고유값 개수 계산 로직을 `sum(!is.na(unique(x)))`로 변경하였습니다.
🎯 Why: `stats::na.omit`은 내부적으로 메서드 디스패치 및 `na.action` 속성 할당을 수행하여 메모리 복사와 오버헤드를 유발합니다.
📊 Impact: 불필요한 메모리 할당 및 복사를 제거하여 고유값 개수 계산 속도가 향상됩니다.
🔬 Measurement: `Rscript -e "testthat::test_dir('tests/testthat')"` 및 `covr::package_coverage()`를 통해 정상 작동 및 커버리지를 확인합니다.
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📝 Walkthrough

Walkthrough

R 코드가 고유 비결측값 개수를 계산하는 방식을 변경합니다. 관련 학습 노트를 추가합니다. R 패키지 빌드 제외 목록과 Markdown 린트 설정도 갱신합니다.

Changes

R 고유값 계산 최적화

Layer / File(s) Summary
고유 비결측값 계산 변경
.jules/bolt.md, R/aFIPC.R, R/surveyFA.R
stats::na.omit() 기반 계산을 sum(!is.na(unique(...)))로 변경합니다. 공통 문항 매칭과 응답 열 필터링의 조건은 유지합니다. 변경 사유를 학습 노트에 기록합니다.

저장소 빌드 및 Markdown 설정

Layer / File(s) Summary
빌드 및 Markdown 설정 갱신
.Rbuildignore, .markdownlint.json
네 개의 개발용 파일을 R 패키지 빌드에서 제외합니다. Markdown 린트 규칙 네 개를 비활성화합니다.

Estimated code review effort: 2 (Simple) | ~10 minutes

Merge Risk: 🔵 Low · up to 854ce

The R count calculation retains its intended non-missing unique-value behavior, but this change globally relaxes documentation linting and adds an imprecise performance explanation. These are bounded maintainability and quality risks that should be addressed before merge.

🚥 Pre-merge checks | ✅ 5
✅ Passed checks (5 passed)
Check name Status Explanation
Docstring Coverage ✅ Passed No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
Description Check ✅ Passed Check skipped - CodeRabbit’s high-level summary is enabled.
Title check ✅ Passed PR 제목은 stats::na.omit 기반 로직을 sum(!is.is.na(unique(x))) 방식으로 단순화하는 주요 변경 사항을 명확하게 설명합니다.
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Actionable comments posted: 2

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Inline comments:
In @.jules/bolt.md:
- Around line 19-21: Update the complexity explanation in the 2025-02-12 entry
to state that stats::na.omit() may allocate and copy a filtered vector and
attach an na.action attribute for atomic x; do not describe method dispatch as
O(N), and acknowledge that unique(x) input processing remains in
sum(!is.na(unique(x))).

In @.markdownlint.json:
- Around line 2-5: Restrict the global markdownlint disables in
.markdownlint.json, especially MD022, MD024, MD041, and MD013, so they apply
only to the necessary files or scopes rather than all Markdown documents.
Preserve exceptions only where required and document the assumptions and risks
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Comment thread .jules/bolt.md
Comment thread .markdownlint.json
@seonghobae
seonghobae marked this pull request as draft September 6, 2026 19:18
@seonghobae seonghobae changed the title ⚡ Bolt: stats::na.omit 오버헤드 제거를 통한 성능 최적화 refactor(response-data): simplify distinct non-missing category counts Sep 6, 2026
💡 What: `stats::na.omit`을 활용한 고유값 개수 계산 로직을 `sum(!is.na(unique(x)))`로 변경하였습니다.
🎯 Why: `stats::na.omit`은 내부적으로 메서드 디스패치 및 `na.action` 속성 할당을 수행하여 메모리 복사와 오버헤드를 유발합니다.
📊 Impact: 불필요한 메모리 할당 및 복사를 제거하여 고유값 개수 계산 속도가 향상됩니다.
🔬 Measurement: `Rscript -e "testthat::test_dir('tests/testthat')"` 및 `covr::package_coverage()`를 통해 정상 작동 및 커버리지를 확인합니다.
💡 What: `stats::na.omit`을 활용한 고유값 개수 계산 로직을 `sum(!is.na(unique(x)))`로 변경하였습니다.
🎯 Why: `stats::na.omit`은 내부적으로 메서드 디스패치 및 `na.action` 속성 할당을 수행하여 메모리 복사와 오버헤드를 유발합니다.
📊 Impact: 불필요한 메모리 할당 및 복사를 제거하여 고유값 개수 계산 속도가 향상됩니다.
🔬 Measurement: `Rscript -e "testthat::test_dir('tests/testthat')"` 및 `covr::package_coverage()`를 통해 정상 작동 및 커버리지를 확인합니다.
💡 What: `stats::na.omit`을 활용한 고유값 개수 계산 로직을 `sum(!is.na(unique(x)))`로 변경하였습니다.
🎯 Why: `stats::na.omit`은 내부적으로 메서드 디스패치 및 `na.action` 속성 할당을 수행하여 메모리 복사와 오버헤드를 유발합니다.
📊 Impact: 불필요한 메모리 할당 및 복사를 제거하여 고유값 개수 계산 속도가 향상됩니다.
🔬 Measurement: `Rscript -e "testthat::test_dir('tests/testthat')"` 및 `covr::package_coverage()`를 통해 정상 작동 및 커버리지를 확인합니다.
@seonghobae seonghobae added priority: medium Normal-priority or P2 work status: draft type: maintenance Maintenance, build, dependency, or operational upkeep maintenance labels Sep 6, 2026 — with ChatGPT Codex Connector
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