⚡ Bolt: stats::na.omit 오버헤드 제거를 통한 고유값 카운트 최적화

[seonghobae]

💡 What:

• R/surveyFA.R와 R/aFIPC.R에서 결측치를 제외한 고유값 개수를 세는 로직인 length(unique(stats::na.omit(x))) (또는 유사 패턴)을 sum(!is.na(unique(x)))로 변경했습니다.
• 관련 학습 내용을 .jules/bolt.md 저널에 기록했습니다.

🎯 Why:

• stats::na.omit은 S3 메서드 디스패치(method dispatch)와 na.action 속성 부여로 인한 추가적인 메모리 할당을 유발합니다. 단순 스칼라 개수 확인이 목적인 상황에서는 논리 연산의 합계를 활용하는 것이 불필요한 자원 낭비(오버헤드)를 줄일 수 있기 때문입니다.

📊 Impact:

• stats::na.omit 오버헤드가 제거되어 vapply 루프나 공통 문항(Common Items) 비교 시 수행 성능이 O(1) 계수 수준에서 향상되었습니다. 정확도나 계산된 결과는 기존과 100% 동일합니다.

🔬 Measurement:

• AFIPC_ENABLE_PACKRAT=true Rscript -e "testthat::test_dir('tests/testthat')"를 통해 기존 수식과 완벽히 동등하게 동작하는 것을 검증 완료했습니다 (55/55 테스트 통과).

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PR created automatically by Jules for task 9966420237496752484 started by @seonghobae

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Configuration used: Organization UI

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📥 Commits

Reviewing files that changed from the base of the PR and between 35e4498 and d48bb5d.

📒 Files selected for processing (7)

• .Rbuildignore
• .jules/bolt.md
• .jules/palette.md
• .jules/sentinel.md
• .markdownlint.json
• R/aFIPC.R
• R/surveyFA.R

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