{
  "fixture": "Synthetic 5000 active threads, 8 PR links each, watches on 10%, Node 24.21.0 on headless Linux. No provider or pending-item population.",
  "method": "Three warm samples for latency profiles; first native setImmediate callback only. Writer probes use actual store and in-memory SQLite with a statement-result payload getter signalling first candidate decode; unchanged JSON; writer shares same SQL connection. Baseline loaded from parent commit with a Node module hook, without worktree edits.",
  "limits": "Synthetic single machine; no general throughput or p95 claim; synchronous initial SQL remains. Getter instrumentation is probe-only, no production seam or committed implementation-coupled test.",
  "results": {
    "18979-background-reads-profile-baseline.json": {
      "label": "baseline",
      "count": 5000,
      "linksPerThread": 8,
      "watchedFraction": 0.1,
      "node": "v24.21.0",
      "results": [
        {
          "mode": "settlement",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 386.04374600000006,
          "delayMs": 101.305971,
          "duringQuery": true
        },
        {
          "mode": "settlement",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 398.6427010000002,
          "delayMs": 121.4394400000001,
          "duringQuery": true
        },
        {
          "mode": "settlement",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 389.395634,
          "delayMs": 96.49241200000006,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 268.22616000000016,
          "delayMs": 76.71842800000013,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 245.48287600000003,
          "delayMs": 64.24655099999973,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 245.56395799999973,
          "delayMs": 71.942047,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 321.07893799999965,
          "delayMs": 75.82566299999962,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 312.3785939999998,
          "delayMs": 93.89916699999958,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 291.55053399999997,
          "delayMs": 79.51031599999988,
          "duringQuery": true
        }
      ]
    },
    "18979-background-reads-profile-baseline-decode.json": {
      "label": "baseline-decode",
      "count": 5000,
      "linksPerThread": 8,
      "watchedFraction": 0.1,
      "node": "v24.21.0",
      "results": [
        {
          "mode": "settlement",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 383.03987199999983,
          "delayMs": 98.71122400000013,
          "duringQuery": true
        },
        {
          "mode": "settlement",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 391.50825799999984,
          "delayMs": 104.4452809999998,
          "duringQuery": true
        },
        {
          "mode": "settlement",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 387.1912690000004,
          "delayMs": 95.76433600000018,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 271.61214299999983,
          "delayMs": 79.06767499999978,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 258.03516299999956,
          "delayMs": 73.46902199999977,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 255.90992599999936,
          "delayMs": 64.63050099999964,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 275.7281230000008,
          "delayMs": 79.59205800000018,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 290.4329480000006,
          "delayMs": 80.81558300000052,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 350.44761199999994,
          "delayMs": 97.65078499999981,
          "duringQuery": true
        },
        {
          "mode": "decode-default",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 245.65259400000014,
          "delayMs": 9.386838000000353,
          "duringQuery": true
        },
        {
          "mode": "decode-default",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 226.09566600000016,
          "delayMs": 11.287604000000101,
          "duringQuery": true
        },
        {
          "mode": "decode-default",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 236.6328739999999,
          "delayMs": 32.16538000000037,
          "duringQuery": true
        },
        {
          "mode": "decode-32",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 224.05813399999988,
          "delayMs": 1.4933609999998225,
          "duringQuery": true
        },
        {
          "mode": "decode-32",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 240.5231020000001,
          "delayMs": 1.3131729999995514,
          "duringQuery": true
        },
        {
          "mode": "decode-32",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 213.2582849999999,
          "delayMs": 2.1537099999995917,
          "duringQuery": true
        },
        {
          "mode": "decode-64",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 223.82902600000034,
          "delayMs": 2.4006640000006882,
          "duringQuery": true
        },
        {
          "mode": "decode-64",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 226.41577699999925,
          "delayMs": 2.265408999999636,
          "duringQuery": true
        },
        {
          "mode": "decode-64",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 192.4316259999996,
          "delayMs": 2.2584159999987605,
          "duringQuery": true
        },
        {
          "mode": "decode-128",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 200.57271800000126,
          "delayMs": 4.422905999999784,
          "duringQuery": true
        },
        {
          "mode": "decode-128",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 178.9552050000002,
          "delayMs": 4.440840000001117,
          "duringQuery": true
        },
        {
          "mode": "decode-128",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 185.34445100000084,
          "delayMs": 4.581475000000864,
          "duringQuery": true
        }
      ]
    },
    "18979-background-reads-profile-after.json": {
      "label": "after",
      "count": 5000,
      "linksPerThread": 8,
      "watchedFraction": 0.1,
      "node": "v24.21.0",
      "results": [
        {
          "mode": "settlement",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 376.9722999999999,
          "delayMs": 85.252567,
          "duringQuery": true
        },
        {
          "mode": "settlement",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 345.8929970000004,
          "delayMs": 86.29914000000008,
          "duringQuery": true
        },
        {
          "mode": "settlement",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 386.3472959999999,
          "delayMs": 103.73506899999984,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 283.42214699999977,
          "delayMs": 87.88509500000009,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 247.24867799999993,
          "delayMs": 60.703144000000066,
          "duringQuery": true
        },
        {
          "mode": "all-prs",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 251.68026199999986,
          "delayMs": 62.21281699999963,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 0,
          "rows": 500,
          "elapsedMs": 86.16625099999965,
          "delayMs": 69.27576599999975,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 1,
          "rows": 500,
          "elapsedMs": 91.17305300000044,
          "delayMs": 68.4395169999998,
          "duringQuery": true
        },
        {
          "mode": "watched-prs",
          "iteration": 2,
          "rows": 500,
          "elapsedMs": 87.55727000000024,
          "delayMs": 69.24389599999995,
          "duringQuery": true
        },
        {
          "mode": "decode-default",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 202.74034399999982,
          "delayMs": 12.249369000000115,
          "duringQuery": true
        },
        {
          "mode": "decode-default",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 217.81707800000004,
          "delayMs": 9.12903600000027,
          "duringQuery": true
        },
        {
          "mode": "decode-default",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 212.9062439999998,
          "delayMs": 9.298773000000438,
          "duringQuery": true
        },
        {
          "mode": "decode-32",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 192.1951820000004,
          "delayMs": 1.3811709999999948,
          "duringQuery": true
        },
        {
          "mode": "decode-32",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 213.97282499999983,
          "delayMs": 1.175464999999349,
          "duringQuery": true
        },
        {
          "mode": "decode-32",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 210.16722600000048,
          "delayMs": 1.2496340000006967,
          "duringQuery": true
        },
        {
          "mode": "decode-64",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 196.16189300000042,
          "delayMs": 2.4690910000008444,
          "duringQuery": true
        },
        {
          "mode": "decode-64",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 206.04643699999997,
          "delayMs": 2.248978999999963,
          "duringQuery": true
        },
        {
          "mode": "decode-64",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 218.78650600000037,
          "delayMs": 2.3701460000002044,
          "duringQuery": true
        },
        {
          "mode": "decode-128",
          "iteration": 0,
          "rows": 5000,
          "elapsedMs": 189.81043899999986,
          "delayMs": 4.47309099999984,
          "duringQuery": true
        },
        {
          "mode": "decode-128",
          "iteration": 1,
          "rows": 5000,
          "elapsedMs": 235.86507400000028,
          "delayMs": 19.792999999999665,
          "duringQuery": true
        },
        {
          "mode": "decode-128",
          "iteration": 2,
          "rows": 5000,
          "elapsedMs": 233.65638000000035,
          "delayMs": 4.551548999999795,
          "duringQuery": true
        }
      ]
    },
    "18979-background-reads-writer-baseline.json": {
      "label": "baseline",
      "count": 5000,
      "linksPerThread": 8,
      "watchedFraction": 0.1,
      "node": "v24.21.0",
      "method": "Real store; statement-result getter signals first candidate decode; writer shares SQL connection. No source edits.",
      "results": [
        {
          "rows": 5000,
          "decodedRows": 5000,
          "writerAt": {
            "rowsAtRequest": 174,
            "rowsAtCompletion": 5000,
            "readFinished": true,
            "elapsedMs": 443.6371959999999
          },
          "persistedWrites": 1,
          "readElapsedMs": 443.8437839999999
        }
      ]
    },
    "18979-background-reads-writer-after.json": {
      "label": "after",
      "count": 5000,
      "linksPerThread": 8,
      "watchedFraction": 0.1,
      "node": "v24.21.0",
      "method": "Real store; statement-result getter signals first candidate decode; writer shares SQL connection. No source edits.",
      "results": [
        {
          "rows": 5000,
          "decodedRows": 5000,
          "writerAt": {
            "rowsAtRequest": 64,
            "rowsAtCompletion": 64,
            "readFinished": false,
            "elapsedMs": 139.86146900000017
          },
          "persistedWrites": 1,
          "readElapsedMs": 459.87183200000004
        }
      ]
    }
  }
}