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⚡ Bolt: 가상화된 목록 내 중복된 날짜 파싱 최적화 - #252

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bolt/optimize-eventlist-date-parsing-1487762667035523101
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⚡ Bolt: 가상화된 목록 내 중복된 날짜 파싱 최적화#252
seonghobae wants to merge 3 commits into
developmentalfrom
bolt/optimize-eventlist-date-parsing-1487762667035523101

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💡 What: EventList 컴포넌트 내 가상화된 Row 목록 렌더링 시 매번 발생하는 불필요한 new Date(sessionStartedAt) 할당을 제거하고, 부모 컴포넌트에서 useMemo로 단 1회 파싱하여 밀리초 숫자를 하위 컴포넌트로 전달하도록 개선했습니다.

🎯 Why: 가상화된 리스트 스크롤 시 화면에 보이는 Row 수(overscan 포함)에 비례하여 초당 수십~수백 번의 무거운 날짜 파싱 연산과 객체 할당이 반복 발생하며, 이는 메모리 스래싱 및 가비지 컬렉션 부하를 일으켜 렌더링 지연을 초래합니다.

📊 Impact: 가상화 스크롤 시 Row 렌더링 비용을 감소시키고 불필요한 GC 오버헤드를 유의미하게 제거합니다 (복잡도를 O(스크롤 프레임 당 렌더링 Row 수)에서 O(1) 할당으로 개선).

🔬 Measurement: 세션 타임라인 이벤트 리스트 페이지 렌더링 및 스크롤을 시도하여 자연스러운 렌더링을 확인하고, 리액트 프로파일러로 Row의 Render Duration 감소를 확인합니다.


PR created automatically by Jules for task 1487762667035523101 started by @seonghobae

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Reviewing files that changed from the base of the PR and between 085aea3 and ceb8e2c.

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  • packages/web/src/components/dashboard/event-list.tsx

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Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

  • Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

  • Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

  • Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

  • Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

  • Result: REQUEST_CHANGES

  • Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head ceb8e2caedf15e5c2eb0aba4b3ea13883ff774a2.

  • Head SHA: ceb8e2caedf15e5c2eb0aba4b3ea13883ff774a2

  • Workflow run: 30822501524

  • Workflow attempt: 1

Coverage evidence

Coverage evidence job did not run or did not publish coverage evidence.

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file: event-list.tsx"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file: event-list.tsx"]
  R1 --> V1["required checks"]
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opencode-agent Bot commented Aug 3, 2026

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OpenCode Review Overview

  • Head SHA: ceb8e2caedf15e5c2eb0aba4b3ea13883ff774a2
  • Workflow run: 30822501524
  • Workflow attempt: 1
  • Gate result: REQUEST_CHANGES (approval step)

Pull request overview

OpenCode cannot approve yet because required coverage evidence did not pass.

Review outcome

1. HIGH .github/workflows/opencode-review.yml:1 - Coverage evidence did not prove required test/docstring evidence

  • Problem: The required coverage-evidence job result was failure, so OpenCode cannot establish approval sufficiency for this head.

  • Root cause: Automated approval is only valid when the same-head coverage-evidence job proves supported repository test suites passed and configured docstring gates passed or were advisory, or reports not applicable because no supported source files or package manifests exist. Missing, failed, skipped, unavailable, or unsupported-tooling test evidence is a blocker.

  • Fix: Install or configure the repository test/docstring evidence tooling when source files or package manifests exist, rerun the current-head coverage-evidence job, and approve only after it reports success with required evidence or explicit no-source not-applicable evidence.

  • Regression test: Keep the approval branch checking needs.coverage-evidence.result == success before posting APPROVE, and publish REQUEST_CHANGES when coverage-evidence blocker states such as cancelled, skipped, failed, unsupported-tooling, or below-100 evidence are present.

  • Result: REQUEST_CHANGES

  • Reason: coverage-evidence result was failure, so required test/docstring evidence was not proven for current head ceb8e2caedf15e5c2eb0aba4b3ea13883ff774a2.

  • Head SHA: ceb8e2caedf15e5c2eb0aba4b3ea13883ff774a2

  • Workflow run: 30822501524

  • Workflow attempt: 1

Coverage evidence

Coverage evidence job did not run or did not publish coverage evidence.

Changed-File Evidence Map

flowchart LR
  PR["PR changed files"] --> Evidence["OpenCode bounded evidence"]
  Evidence --> S1["Changed file: event-list.tsx"]
  S1 --> I1["repository behavior"]
  I1 --> R1["Review risk: Changed file: event-list.tsx"]
  R1 --> V1["required checks"]
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Superseded by #267, which includes the same EventList one-time sessionStartedAt parsing optimization and also covers the corresponding SessionTimelineChart path. Closing this single-file duplicate avoids competing edits. #267 must establish its own exact-head tests and benchmark evidence; no evidence transfers from this branch.

@seonghobae seonghobae closed this Aug 5, 2026
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Superseded by #267, which includes the same EventList one-time sessionStartedAt parsing optimization and also covers the corresponding SessionTimelineChart path. Closing this single-file duplicate avoids competing edits. #267 must establish its own exact-head tests and benchmark evidence; no evidence transfers from this branch.

Understood. Acknowledging that this PR has been closed as it is superseded by #267. Stopping work on this task.

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