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docs: record rejected symbol board cache

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boris
2026-09-05 03:28:06 +08:00
parent f2105399c5
commit 224adf70d4
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docs/evidence/cached-symbol-board-rejection-20260905.json
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{
"schemaVersion": "fidc-cached-symbol-board-rejection/v1",
"measuredAt": "2026-09-05T03:22:00+08:00",
"host": "192.168.31.177",
"candidateCommit": "eb8b146",
"revertCommit": "f210539",
"candidate": {
"description": "precompute a symbol-id-aligned BJSE bit vector and share one suffix classifier between platform expressions and risk control",
"primaryHotEngineSeconds": [4.656, 4.759, 4.669, 4.698, 4.614],
"primaryHotMedianEngineSeconds": 4.669,
"acceptedPrimaryBaselineMedianEngineSeconds": 4.729,
"primaryObservedImprovementPercent": 1.2687661249735674,
"secondaryLowContentionEngineSeconds": [4.404, 4.327, 4.346],
"secondaryLowContentionMedianEngineSeconds": 4.346,
"acceptedSecondaryBaselineMedianEngineSeconds": 4.049,
"secondaryObservedRegressionPercent": 7.33514448011855,
"highContentionSecondaryEngineSecondsExcluded": [6.398]
},
"rollbackComparison": {
"primaryEngineSecondsExcluded": [12.736, 12.795, 12.899, 13.845],
"hostLoadAverage": 44.84,
"reason": "managed symbolic workers entered a roughly 30-core phase, so the rollback batch cannot serve as a same-load wall-time comparison"
},
"businessContract": {
"primaryTotalReturn": 0.9219861819172002,
"primaryTradeCount": 26088,
"primaryCanonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
"primaryResultStoreSha256": "92343fb369fea68b2544b654151c5c43a935940580b14afbe8eefb3844f72a54",
"secondaryTotalReturn": 1.1342962298106998,
"secondaryTradeCount": 19404,
"secondaryCanonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
"secondaryResultStoreSha256": "416d2f87241fb4c6b917f6aeecb588f82f6e7d51a103f4c53a74d11971f16839",
"resultConsistent": true,
"terminalAuditStatus": "clean"
},
"profile": {
"allThreadRunId": "btr_1788549525151_3404548_13",
"allThreadRunEngineSeconds": 4.957,
"trimMatchesPercent": 2.0,
"typedBaselineSingleWorkerProfileTrimMatchesPercent": 2.85,
"comparisonLimited": true,
"reason": "the two profiles used different thread attachment sets and cannot establish an end-to-end speedup"
},
"remoteArtifacts": [
"/srv/fidc/canonical/run/fidc-private/evidence/cached-symbol-board-primary-20260905.json",
"/srv/fidc/canonical/run/fidc-private/evidence/cached-symbol-board-secondary-20260905.json",
"/srv/fidc/canonical/run/fidc-private/evidence/cached-symbol-board-rollback-primary-20260905.json",
"/srv/fidc/canonical/run/fidc-private/evidence/cached-symbol-board-all-threads-profile-20260905/perf.data"
],
"acceptance": {
"status": "rejected_and_removed",
"reason": "the candidate preserved correctness but did not improve both five-year strategies, and the later rollback batch was too heavily contended to overturn the cross-strategy regression"
}
}