⚡ Bolt: 캘린더 월간 뷰 그리드 렌더링 최적화

[seonghobae]

💡 What:
CalendarMonthView 컴포넌트 내에서 JSX 반환 시 인라인으로 생성되던 달력 그리드(35개 셀) 배열 매핑 로직을 useMemo로 분리하여 메모이제이션했습니다.

🎯 Why:
JSX 내에서 배열을 매핑하여 렌더링하는 작업은 무관한 상태 업데이트 시에도 O(N)의 재계산 및 렌더링 비용을 발생시킵니다. 이를 useMemo로 감싸서, 실제 이벤트 데이터(monthEventsByDay)가 변경될 때만 렌더링을 수행하여 메인 스레드 블로킹을 방지하기 위함입니다.

📊 Impact:
불필요한 그리드 셀 재계산을 방지하여 렌더링 성능 최적화. 불필요한 O(N) 렌더링 주기를 없앴습니다.

🔬 Measurement:
달력 뷰 렌더링 시 React Profiler를 통해 메인 스레드 렌더링 시간 및 불필요한 재계산 횟수 감소 여부를 확인할 수 있습니다.

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PR created automatically by Jules for task 14960085601127379035 started by @seonghobae

Summary by CodeRabbit

• Performance Improvements

  • Improved calendar month view rendering by reducing unnecessary recalculations when displaying the calendar grid.
  • Preserved the existing 35-cell layout, day labels, event rendering, and visual styling while making updates more efficient.

• Documentation

  • Added guidance for avoiding repeated calculations when generating and displaying React grid content.

[google-labs-jules]

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Pro Plus

Run ID: 2ccc0e89-4044-43a9-bf30-b73beca76844

📥 Commits

Reviewing files that changed from the base of the PR and between 5f5d04a and ffdd4cb.

📒 Files selected for processing (2)

• .jules/bolt.md
• frontend/src/components/calendar/CalendarMonthView.tsx

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📝 Walkthrough

Walkthrough

CalendarMonthView now memoizes its 35-cell grid generation using monthEventsByDay as a dependency. The existing labels, events, content, and styling remain unchanged. Project guidance documents memoization for fixed-size React grid generation.

Changes

Calendar grid memoization

Layer / File(s)	Summary
Memoized calendar grid frontend/src/components/calendar/CalendarMonthView.tsx, .jules/bolt.md	CalendarMonthView generates and renders memoized 35-cell grid content. The guidance documents the same useMemo pattern for React grids.

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

Possibly related PRs

• ContextualWisdomLab/naruon#1191: Memoizes React-rendered array content in EmailList.
• ContextualWisdomLab/naruon#1198: Memoizes the calendar grid in CalendarMonthView.
• ContextualWisdomLab/naruon#1207: Memoizes the same inline calendar grid generation.

🚥 Pre-merge checks | ✅ 4

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the calendar month-view grid rendering optimization, which matches the main change.
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 docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bolt-calendar-memoize-14960085601127379035

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[seonghobae]

Closing as superseded by #1217, which carries the same CalendarMonthView grid memoization and is the selected reviewed implementation.

[google-labs-jules]

Closing as superseded by #1217, which carries the same CalendarMonthView grid memoization and is the selected reviewed implementation.

Understood. Acknowledging that this work is superseded by #1217 and stopping work on this task.