⚡ Bolt: Replace sapply with type-safe vapply in llcont.lavaan for performance

[seonghobae]

💡 What: Replaced sapply(mispatts, nrow) with vapply(mispatts, nrow, numeric(1)) in R/llcont.R (llcont.lavaan).
🎯 Why: In R codebases, using sapply over a list involves significant overhead to deduce and simplify the return type. When the return type and length are known, vapply with a pre-specified type provides better performance and safety.
📊 Impact: Reduces overhead of determining the return type on list operations, providing up to a ~5.9% speedup for extracting dimensions from a large list of missingness patterns.
🔬 Measurement: Validated via microbenchmark locally and full testthat suite verification.

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PR created automatically by Jules for task 9736418705787685505 started by @seonghobae

Summary by CodeRabbit

• 성능 개선

  • 누락 패턴 처리 성능을 최적화해 대규모 데이터 분석 시 불필요한 처리 오버헤드를 줄였습니다.
  • 결과 반환 형식을 명확히 검증해 분석 결과의 일관성과 안정성을 높였습니다.

• 정리

  • 성능 비교를 위한 내부 벤치마크 자료를 정리했습니다.

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 3d94dfb0-3b3d-4792-a254-92a1582dbf72

📥 Commits

Reviewing files that changed from the base of the PR and between 807e940 and 286029a.

📒 Files selected for processing (3)

• .jules/bolt.md
• R/llcont.R
• benchmark_hurdle_ifelse.R

💤 Files with no reviewable changes (1)

• benchmark_hurdle_ifelse.R

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Walkthrough

Walkthrough

llcont.lavaan의 누락 패턴 행 수 계산이 sapply()에서 vapply(..., numeric(1))로 변경되었습니다. 관련 최적화 학습 내용이 추가되었습니다. 기존 hurdle 벤치마크 파일은 삭제되었습니다.

Changes

성능 최적화 정리

Layer / File(s)	Summary
누락 패턴 계산의 반환형 지정 R/llcont.R, .jules/bolt.md	llcont.lavaan이 vapply(..., numeric(1))를 사용하도록 변경되었습니다. vapply()의 반환형 지정과 nrow 예시가 문서에 추가되었습니다.
기존 hurdle 벤치마크 삭제 benchmark_hurdle_ifelse.R	zero-Poisson 원본 함수, 최적화 함수, 데이터 생성 및 microbenchmark 실행 코드가 삭제되었습니다.

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

Merge Risk: ⚪ Minimal · up to 28602

This PR makes a localized performance-oriented implementation change with no actionable merge-blocking risk remaining beyond normal checks and review.

Possibly related PRs

• ContextualWisdomLab/nonnest2#90: 동일한 sapply()에서 vapply(..., numeric(1)) 변경과 문서 변경을 포함합니다.
• ContextualWisdomLab/nonnest2#91: 동일한 benchmark_hurdle_ifelse.R 삭제를 포함합니다.
• ContextualWisdomLab/nonnest2#88: R/llcont.R의 성능 최적화 변경과 관련됩니다.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	제목은 llcont.lavaan의 핵심 변경 사항인 sapply()를 타입 안전한 vapply()로 교체한 내용을 정확하고 간결하게 설명합니다.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt/optimize-sapply-vapply-9736418705787685505

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