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fidc-backtest-engine/docs/evidence/frozen-standard-rolling-lookbacks-rejection-20260905.json
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{
"schemaVersion": "fidc-frozen-standard-rolling-lookbacks-rejection/v1",
"measuredAt": "2026-09-05T03:03:00+08:00",
"host": "192.168.31.177",
"candidateCommit": "32e4030",
"revertCommit": "05e67c73df0c002efec15711dd5ef066d817abec",
"restoredRunnerBinarySha256": "1071852a374620029398a967d485b827ed2defbb6ecbcc3f1ee6ffd3e2db76b6",
"candidate": {
"description": "replace per-stock rolling requirement-set lookups with strategy-level fixed standard lookback arrays",
"primaryHotEngineSeconds": [4.329, 4.455, 4.751, 4.822, 4.847],
"primaryHotMedianEngineSeconds": 4.751,
"secondaryEngineSeconds": [4.774, 5.473, 6.161, 5.491],
"hardwareRunId": "btr_1788548442183_3221468_10",
"hardwareRunEngineSeconds": 10.522,
"hardwareRunHostLoadAverage": 42.93,
"instructions": 26384933876,
"branches": 4682344116
},
"acceptedBaseline": {
"engineCommit": "75ab0c0",
"primaryHotMedianEngineSeconds": 4.729,
"instructions": 26049740736,
"branches": 4601262679
},
"observed": {
"primaryMedianRegressionPercent": 0.4652146331148285,
"instructionRegressionPercent": 1.2867427104054538,
"branchRegressionPercent": 1.7621562309418415
},
"businessContract": {
"primaryTotalReturn": 0.9219861819172002,
"primaryTradeCount": 26088,
"primaryCanonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
"primaryResultStoreSha256": "92343fb369fea68b2544b654151c5c43a935940580b14afbe8eefb3844f72a54",
"secondaryTotalReturn": 1.1342962298106998,
"secondaryTradeCount": 19404,
"secondaryCanonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
"secondaryResultStoreSha256": "416d2f87241fb4c6b917f6aeecb588f82f6e7d51a103f4c53a74d11971f16839",
"resultConsistent": true,
"terminalAuditStatus": "clean"
},
"remoteArtifacts": [
"/srv/fidc/canonical/run/fidc-private/evidence/frozen-standard-rolling-lookbacks-primary-20260905.json",
"/srv/fidc/canonical/run/fidc-private/evidence/frozen-standard-rolling-lookbacks-secondary-20260905.json",
"/srv/fidc/canonical/run/fidc-private/evidence/frozen-standard-rolling-lookbacks-perf-stat-20260905/perf-stat.csv"
],
"acceptance": {
"status": "rejected_and_removed",
"reason": "the compiler layout change increased retired instructions and branches while the primary end-to-end median did not improve"
}
}