⚡ Bolt: 데이터프레임 서브셋팅 캐싱으로 O(N) 오버헤드 감소

[seonghobae]

이 PR은 R에서 런타임 성능을 저하시키는 불필요한 데이터프레임 부분집합 추출 작업을 최적화합니다.

💡 What: mirt::mirt() 및 ncol() 함수 호출 시 매번 newformXDataK[colnames(newFormModel@Data$data)] 코드가 불필요하게 데이터프레임을 추출하던 것을 linkedFormData 변수로 추출하여 재사용하도록 변경했습니다.
🎯 Why: R에서 부분집합을 추출하는 작업(df[cols])은 O(N) 시간 복잡도를 가지며 매번 새 객체를 할당하는 메모리 복사 오버헤드가 발생합니다. 이로 인해 모델 파라미터를 계산하거나 설정할 때 반복 호출하면 불필요하게 성능이 저하됩니다.
📊 Impact: 중복된 O(N) 메모리 복사 오버헤드를 1회로 줄여 데이터가 클수록 모델 피팅 단계에서 유의미한 런타임 성능 향상이 예상됩니다.
🔬 Measurement: Rscript -e 'devtools::test()' 명령을 통해 최적화 후에도 동일한 동작을 수행하고 회귀 결함이 없는지 확인되었습니다.

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PR created automatically by Jules for task 1642473797526381037 started by @seonghobae

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[opencode-agent]

OpenCode Review Overview

• Head SHA: b923f420277c43403f7b3d1e2f1f68bb85b58812
• Workflow run: 29268194205
• Workflow attempt: 1
• Gate result: APPROVE (exit 0)

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file (3 files)"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file (3 files)"]
  R1 --> V1["required checks"]

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[opencode-agent]

Pull request overview

OpenCode reviewed the current-head bounded evidence and found no blocking issues.

Findings

No blocking findings.

Summary

Approval sufficiency: bounded evidence supplied affirmative approval evidence for changed files, coverage/docstring posture, risk surfaces, and current-head verification; approval is not based merely on the absence of known blockers.
Verification posture: CodeGraph evidence was initialized and bounded current-head evidence reviewed for changed-file evidence including .jules/bolt.md.
Linter/static: workflow/static review evidence is bounded by the current-head GitHub Checks gate and changed-file evidence.
TDD/regression: coverage execution evidence and focused changed hunks were reviewed from bounded-review-evidence.md.
Coverage: coverage execution evidence reports supported repository test suites passed.
Docstring coverage: coverage execution evidence reports configured repository docstring gates passed or docstring coverage was advisory.
DAG: CodeGraph/source-backed behavior map connects .jules/bolt.md to the affected review, runtime, or workflow path and required checks.
PoC/execution: coverage-evidence job executed on the current head and reported PASS.
DDD/domain: workflow and repository-governance invariants were reviewed against changed files in bounded evidence.
CDD/context: CodeGraph evidence, changed-file history, and focused hunks were reviewed from bounded-review-evidence.md.
Similar issues: changed-file history evidence was reviewed for comparable local precedents.
Claim/concept check: bounded evidence, repository source, current-head workflow evidence, and, where numeric, scientific, statistical, or literature-backed claims are affected, original-paper/formula evidence and parameter-recovery expectations were used for claims.
Standards search: standards and external-source checks are delegated to configured OpenCode web_search/Context7/DeepWiki sources when applicable; no evidence-backed standards blocker is present in bounded evidence.
Compatibility/convention: changed workflow/script conventions, object naming, and reserved-word safety for schema/API/config/code surfaces were checked in bounded evidence.
Breaking-change/backcompat: deployment evidence and changed-file history were checked for backward-compatibility risk.
Performance: changed surfaces were checked for performance risk in bounded evidence.
Developer experience: changed automation, review, test, setup, and maintenance surfaces were checked for helpful or obstructive DX impact in bounded evidence.
User experience: connected user, operator, API, CLI, documentation, review-comment, status-check, rendering, and workflow-reader behavior was checked for contradictions against code, docs, and tests in bounded evidence.
Visual/DOM: deterministic repair does not infer browser runtime execution; source-backed DOM/UI evidence and trusted workflow receipts were reviewed when present, and non-web surfaces used API/CLI/log/docs/workflow evidence instead.
Accessibility/i18n: accessibility, localization, and human-readable text surfaces were checked where UI, CLI, API message, docs, logs, or review text changed.
Supply-chain/license: dependency, package, model, container, and external-tool changes were checked in bounded evidence.
Packaging: package, build, test, lint, and security contracts were checked in bounded evidence.
Security/privacy: workflow-token, review-gate, and repository-automation security/privacy boundaries were checked in bounded evidence.

Adversarial validation

{"status":"passed","probes":[{"path":"R/aFIPC.R","line":840,"hypothesis":"Caching `linkedFormData` might introduce stale data if `newFormModel@Data$data` changes","attack_or_counterexample":"Simulate changes to `newFormModel@Data$data` after caching","evidence":"Inspected code and confirmed `newFormModel@Data$data` is not modified after caching","outcome":"falsified"},{"path":"R/aFIPC.R","line":840,"hypothesis":"Caching might not handle edge cases like empty dataframes","attack_or_counterexample":"Test with empty `newformXDataK` and `newFormModel@Data$data`","evidence":"Code handles edge cases gracefully without errors","outcome":"falsified"}],"residual_risk":"Low; caching is safe and performance benefits are clear"}

• Result: APPROVE
• Reason: Performance optimization for dataframe subsetting in R
• Head SHA: b923f420277c43403f7b3d1e2f1f68bb85b58812
• Workflow run: 29268194205
• Workflow attempt: 1