{
  "schemaVersion": "fidc-transient-selection-arena/v1",
  "measuredAt": "2026-09-05T05:57:00+08:00",
  "host": "192.168.31.177",
  "engineCommit": "d89dd24f0a3993ed10b00957f947b65d91b00ffc",
  "serviceCommit": "9fd5a9e6d5668af57f6942fc3c4127953545d9c6",
  "runnerBinarySha256": "53680c33cd96487c52c47b96bb8c6f0bece69bb5617a6036d382f4262c181b2c",
  "implementation": {
    "description": "keep custom-rank and quote-plan stock states in a contiguous transient arena, sort lightweight state indexes, and isolate ordered and generic selection functions",
    "candidateSnapshotCacheUsed": false,
    "selectionResultCached": false,
    "stateArenaSharedAcrossRuns": false,
    "stateArenaLifetime": "single selection call",
    "riskDecisionOrderChanged": false,
    "pitSemanticsChanged": false
  },
  "rejectedIntermediate": {
    "commit": "7f7fce1",
    "problem": "stored StockExpressionState directly in the sortable tuple and repeatedly moved the large value during stable sorting",
    "rollbackBaselineEngineSeconds": 5.934,
    "observedBadCandidateEngineSeconds": [6.972, 8.868, 8.748, 9.317, 6.251],
    "retainedInFinalCode": false
  },
  "genericRankFiveYearContract": {
    "requestSha256": "06a5cdf6a96673d45cc54f4ff0f18a125dbcc0b80d0d52496f8a0c638bbc81d3",
    "rankBy": "free_float_cap",
    "totalReturn": 0.7140315244542004,
    "tradeCount": 21876,
    "canonicalSha256": "84367993911b42437939aad88f29379d007af6f5f171667ff7ad6677dd488fd2",
    "resultStoreSha256": "e2c7401bb9950da6fdfc0b516428061651e3e5b874a5f80c4b03ab8a81e90191",
    "rollbackMedianEngineSeconds": 5.934,
    "finalEngineSeconds": [4.143, 4.125, 4.218, 4.226, 4.379],
    "finalMedianEngineSeconds": 4.222,
    "observedMedianImprovementPercent": 28.850691,
    "resultConsistent": true,
    "terminalAuditStatus": "clean"
  },
  "primaryOrderedFiveYearContract": {
    "totalReturn": 0.9219861819172002,
    "tradeCount": 26088,
    "canonicalSha256": "b42fea66237d06eadb24f6b8c9e2760e7319fe3699f315b99e01f433ef2aa234",
    "resultStoreSha256": "92343fb369fea68b2544b654151c5c43a935940580b14afbe8eefb3844f72a54",
    "engineSeconds": [2.647, 2.692, 2.659, 2.813, 2.768],
    "allRunMedianEngineSeconds": 2.692,
    "previousAcceptedMedianEngineSeconds": 2.667,
    "observedMedianDeltaPercent": 0.937383,
    "classification": "within_host_load_variance",
    "resultConsistent": true,
    "terminalAuditStatus": "clean"
  },
  "secondaryOrderedFiveYearContract": {
    "totalReturn": 1.1342962298106998,
    "tradeCount": 19404,
    "canonicalSha256": "0dbd3fad624097c673c4a5ec2f545f95e9c21d1d5337bb2b48ffeb22b16cb2b9",
    "resultStoreSha256": "416d2f87241fb4c6b917f6aeecb588f82f6e7d51a103f4c53a74d11971f16839",
    "rollbackMedianEngineSeconds": 2.408,
    "finalProcessHotMedianEngineSeconds": 2.372,
    "observedMedianImprovementPercent": 1.495017,
    "resultConsistent": true,
    "terminalAuditStatus": "clean"
  },
  "fullMinuteContract": {
    "scheduleTime": "10:18",
    "matchingType": "minute_last",
    "slippageModel": "price_ratio",
    "slippageValue": 0.001,
    "totalReturn": 0.03473222656500008,
    "tradeCount": 156,
    "canonicalSha256": "457c086b1bca784fe83f447bb22451925e8f022456bb0fc7b54237a7a7886849",
    "resultStoreSha256": "04d804ee02ad7bc9b3649b4a2b4ddd902a4242ef38e00edeed8058860e9a6997",
    "totalSeconds": [0.6, 0.546],
    "engineSeconds": [0.155, 0.164],
    "resultConsistent": true,
    "terminalAuditStatus": "clean"
  },
  "genericRankProfile": {
    "runId": "btr_1788558913084_672102_18",
    "engineSeconds": 4.46,
    "allThreadEventCycles": 33149272847,
    "transientStockStateBuilderPercent": 16.1,
    "numericVmEvaluatePercent": 8.53,
    "rankedSelectionPercent": 6.8,
    "adjustedCloseMovingAveragePercent": 4.87,
    "stableSortPercent": 3.68,
    "mallocPercent": 3.34,
    "lostSamples": 0
  },
  "memory": {
    "serviceCgroupCurrentBytes": 11510001664,
    "serviceCgroupPeakBytes": 11511304192,
    "persistentCacheAddedBytes": 0
  },
  "testGate": {
    "workspaceTotal": 544,
    "passed": 536,
    "ignoredManualBenchmarks": 8,
    "failed": 0,
    "quotePlanTransientCacheAssertions": true
  },
  "remoteArtifacts": [
    "/srv/fidc/canonical/run/fidc-private/evidence/free-float-rank-five-year-request-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-rollback-generic-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-final-generic-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-final-primary-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-rollback-secondary-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-final-secondary-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-final-full-minute-20260905.json",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-final-profile-20260905/perf.data",
    "/srv/fidc/canonical/run/fidc-private/evidence/transient-selection-final-profile-20260905/perf-report.txt"
  ],
  "acceptance": {
    "status": "accepted_generic_transient_selection_arena",
    "reason": "the same frozen custom-rank contract is about 28.85 percent faster than an immediate rollback, both ordered five-year contracts and full-minute execution preserve exact outputs, the final design sorts indexes rather than large states, and no persistent cache is added"
  }
}