# Complete - m-performance-hotspot-optimization/12+10,11_dart_isolate_large_payload

## 완료 일시

2026-06-06

## 요약

Dart isolate gateway large payload transfer 최적화 구현을 1회 리뷰했고 최종 판정은 PASS다.

## 루프 이력

| Plan | Review | Verdict | 메모 |
|------|--------|---------|------|
| `plan_cloud_G07_0.log` | `code_review_cloud_G07_0.log` | PASS | TransferableTypedData 기반 IO handoff, web fallback 보존, 1MB payload evidence가 계획 범위를 충족했다. |

## 구현/정리 내용

- Dart IO `IsolateInboundGateway`가 32KB 이상 raw frame과 decoded data payload를 `TransferableTypedData`로 넘기도록 변경했다.
- `dart:isolate` 의존성은 IO 전용 파일에만 두고 web conditional fallback은 `SyncInboundGateway` 경로를 유지했다.
- 1MB frame decode correctness tests를 추가하고 TCP/WS 1MB payload stress row를 기록했다.

## 최종 검증

- `dart test test/communicator_test.dart -r expanded` - PASS; reviewer rerun에서 28 tests passed.
- `dart analyze lib/src/inbound_gateway_io.dart test/communicator_test.dart` - PASS; No issues found.
- `dart test test/socket_test.dart -r expanded` - PASS; reviewer rerun에서 41 tests passed.
- `dart compile js test/browser_ws_import_compile.dart -o /tmp/proto_socket_browser_ws_import_compile_review.js` - PASS; JavaScript output generated.
- `bash agent-ops/skills/project/run-proto-socket-test-matrix/scripts/run_stress.sh --full --lang dart --transport tcp,ws --profile payload` - PASS; result=`agent-test/runs/20260606-050440-proto-socket-stress-full.md`, Dart TCP/WS 1MB rows stability violations 0.
- `bash agent-ops/skills/project/run-proto-socket-test-matrix/scripts/run_performance.sh --quick` - PASS; result=`agent-test/runs/20260606-050449-proto-socket-performance-quick.md`, same-language/cross-language/typescript-gateway components PASS.

## Roadmap Completion

- Milestone: `agent-roadmap/milestones/performance-hotspot-optimization.md`
- Completed task ids:
  - `dart-isolate-large-payload-transfer`: PASS; evidence=`agent-task/archive/2026/06/m-performance-hotspot-optimization/12+10,11_dart_isolate_large_payload/plan_cloud_G07_0.log`, `agent-task/archive/2026/06/m-performance-hotspot-optimization/12+10,11_dart_isolate_large_payload/code_review_cloud_G07_0.log`; verification=`dart test test/communicator_test.dart -r expanded`, `dart compile js test/browser_ws_import_compile.dart -o /tmp/proto_socket_browser_ws_import_compile_review.js`, `bash agent-ops/skills/project/run-proto-socket-test-matrix/scripts/run_stress.sh --full --lang dart --transport tcp,ws --profile payload`, `bash agent-ops/skills/project/run-proto-socket-test-matrix/scripts/run_performance.sh --quick`
- Not completed task ids: 없음

## 잔여 Nit

- `dart/test/communicator_test.dart`의 신규 large payload tests에 trailing whitespace 4건이 남아 있다. 후속 정리 시 `dart format dart/lib/src/inbound_gateway_io.dart dart/test/communicator_test.dart` 또는 공백 제거로 정리 가능하다.

## 후속 작업

- 없음
