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hapi/docs/performance/native-scroll-2026-09-10.json
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weishu 0dcc70e7c7 perf(native): optimize iOS transcript refresh and add frame profiling 
Preserve hosted rows while propagating current SwiftUI environments and render captures. Add differential refresh regressions, opt-in real-clock iOS/Android profiling, and reproducible performance results.

Validation: typecheck; CLI/hub/web/shared/relay suites (Web rerun with NODE_OPTIONS=--no-experimental-webstorage for Node 26/jsdom compatibility); existing iOS Debug/Release and Android regression runs.
2026-09-10 16:22:36 +08:00

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{
"schemaVersion": 1,
"date": "2026-09-10",
"businessCodeBaseline": "5194271f",
"host": {
"cpu": "Apple M4 Pro",
"cores": 14,
"memoryGiB": 48,
"os": "macOS 26.6.2",
"xcode": "26.6"
},
"scope": "800 synthetic messages, actual native renderers, UI-only; no network/pagination/images; 3 repetitions per scenario",
"metricCaveats": [
"iOS values are real CADisplayLink callback cadence, NOT compositor-presented FPS.",
"iOS CPU-sampled run excluded from timing results; overlapping stack-path percentages are not additive.",
"Android present cadence uses only real drag intervals, excludes pauses between gestures.",
"Android emulator Prediction Error/Early Present classifications are not app-jank counts.",
"Android profile build is non-debuggable and unminified, not the store APK.",
"Android initial 64 MiB trace lost early intervals; its app JSON/gfxinfo are complete.",
"Android controlled run changed environment, not app business code; no app FPS improvement claim.",
"No real-device FPS claim or CI timing threshold."
],
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"offsetUpdateMaxMs": 0.3138750034850091,
"os": "26.5",
"repetition": 3,
"rows": 800,
"scenario": "rich-updates",
"seconds": 6.0000150833511725,
"viewportHeight": 759,
"viewportWidth": 393
}
],
"runOrder": [
"optimizedFirst",
"baselineControl",
"optimizedRepeat"
],
"correctness": {
"debug": "14 tests passed, including zero-configuration work budgets.",
"release": "13 tests passed in each optimized batch, including the opt-in frame profile.",
"debugElapsedCaveat": "One geometry integration test elapsed about 650 seconds during host sleep, confirmed by local pmset events (13:16-13:27). Not a frame timing result; the Release counterpart took about 0.33 seconds."
}
}
}
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