{
  "status": "historical",
  "created": "2026-09-14",
  "base_commit": "ed17ef324e04e0e04a95bdf5991849576929e51e",
  "starting_evidence": "https://github.com/commontoolsinc/labs/issues/7179#issuecomment-5668537208",
  "machine": {
    "cpu": "Apple M3 Max",
    "os": "macOS 26.4.1 (25E253)",
    "architecture": "arm64"
  },
  "scope": "One collector call, real emulated-storage reads; no lift, map, JSX or pane startup.",
  "source_hashes": {
    "baseline_prepare_sha256": "af74f7e495fbcb312c7edd7a06404aca78ad6aceba11f104ce4784b6b344e7b8",
    "fixed_prepare_sha256": "5b8faac32e8952c0e269deeae5e535c209f29fce6f4e6f1680b6ead4fcb6dfa5",
    "benchmark_sha256": "a032dc07b6b4d23c5fb01fbd0584a0dc9e7dddec77e889173edb8e93bdca589f"
  },
  "baseline_export_diff": "--- HEAD/prepare.ts\n+++ baseline/prepare.ts\n@@ -5414,14 +5414,13 @@\n   }\n };\n \n-// Union of confidentiality (and integrity) atoms across every non-internal labeled read in the\n-// transaction, resolved from stored labels the same way verifyInputRequirements\n-// resolves them. Transaction-global by design \u2014 deliberately NOT scoped to a\n-// D4 read prefix: a sink request is built from whatever the handler read, and\n-// the sink-request input does not record its own read provenance, so the whole\n-// consumed set is the sound over-approximation for the egress ceiling\n-// (docs/specs/cfc-write-prefix-provenance.md \u00a77.4).\n-const collectConsumedLabel = (\n+/**\n+ * Join confidentiality and integrity across the transaction's non-internal\n+ * labeled reads, retaining each source in first-seen order for refusal details.\n+ * A sink request can depend on any handler read, so the consumed set is\n+ * transaction-global (docs/specs/cfc-write-prefix-provenance.md \u00a77.4).\n+ */\n+export const collectConsumedLabel = (\n   tx: IExtendedStorageTransaction,\n ): {\n   confidentiality: readonly CfcConfClause[];\n",
  "collector_fix_diff": "--- baseline/prepare.ts\n+++ fixed/prepare.ts\n@@ -5440,6 +5440,7 @@\n   const atoms: unknown[] = [];\n   const modulePolicySpaces = new Map<string, Set<MemorySpace>>();\n   const sources: ConsumedAtomSource[] = [];\n+  const sourceBuckets = new Map<string, ConsumedAtomSource[]>();\n   const noteSource = (\n     atom: unknown,\n     read: CfcAddress,\n@@ -5448,18 +5449,24 @@\n     // Deduplicated on the same terms a consumer matches on: one entry per\n     // (clause, address, label path). Two label-map entries of one document\n     // carrying the same clause to the same read are one source.\n-    if (\n-      sources.some((seen) =>\n-        seen.read.id === read.id && seen.read.space === read.space &&\n-        seen.read.scope === read.scope &&\n-        pathKey(seen.read.path) === pathKey(read.path) &&\n-        pathKey(seen.labelPath) === pathKey(labelPath) &&\n-        deepEqual(seen.atom, atom)\n-      )\n-    ) {\n+    // The tuple keeps address fields and pointer boundaries unambiguous,\n+    // including paths containing separators. Only atoms sharing that identity\n+    // need structural comparison; `sources` retains global first-seen order.\n+    const key = JSON.stringify([\n+      read.id,\n+      read.space,\n+      read.scope,\n+      pathKey(read.path),\n+      pathKey(labelPath),\n+    ]);\n+    const bucket = sourceBuckets.get(key);\n+    if (bucket?.some((seen) => deepEqual(seen.atom, atom))) {\n       return;\n     }\n-    sources.push({ atom, read, labelPath });\n+    const source = { atom, read, labelPath };\n+    sources.push(source);\n+    if (bucket === undefined) sourceBuckets.set(key, [source]);\n+    else bucket.push(source);\n   };\n   // Integrity evidence riding the same consumed entries: the guard pool the\n   // exchange evaluator matches rule preconditions against (Epic B5). Same\n",
  "measurement_driver": "// Diagnostic runner: execute the maintained benchmark bodies once per process.\n// Their module-level validation provides one warm collection at each size.\nconst cases: Deno.BenchDefinition[] = [];\nDeno.bench = ((definition: Deno.BenchDefinition) => {\n  cases.push(definition);\n}) as typeof Deno.bench;\nawait import(\"file:///Users/berni/.codex/worktrees/e181/labs/packages/runner/test/cfc-consumed-source-dedup.bench.ts\");\nconst results = [];\nfor (const definition of cases) {\n  let start = NaN;\n  let elapsed = NaN;\n  const context = {\n    name: definition.name,\n    origin: import.meta.url,\n    start: () => { start = performance.now(); },\n    end: () => { elapsed = performance.now() - start; },\n  } satisfies Deno.BenchContext;\n  await definition.fn(context);\n  if (!Number.isFinite(elapsed)) throw new Error(\"Missing explicit timer\");\n  results.push({ name: definition.name, ms: elapsed });\n}\nconsole.log(JSON.stringify({ runtime: Deno.version, results }));\n",
  "controller": "import json, os, pathlib, subprocess, time\nroot = pathlib.Path('/Users/berni/.codex/worktrees/e181/labs')\nout = pathlib.Path('/tmp/cfc-source-dedup-e181')\ntarget = root / 'packages/runner/src/cfc/prepare.ts'\nversions = {arm: (out / f'prepare-{arm}.ts').read_bytes() for arm in ('baseline', 'fixed')}\nrecords = []\ntry:\n    for rep in range(1, 6):\n        for arm in (('baseline', 'fixed') if rep % 2 else ('fixed', 'baseline')):\n            target.write_bytes(versions[arm])\n            name = f'{arm}-{rep}'\n            record = {'rep': rep, 'arm': arm, 'start': time.time(), 'load_before': os.getloadavg()}\n            with (out / f'{name}.json').open('w') as stdout, (out / f'{name}.log').open('w') as stderr:\n                result = subprocess.run(['deno', 'run', '--no-lock', '--config', str(root / 'deno.jsonc'), '-A', str(out / 'replay.ts')], cwd=root, stdout=stdout, stderr=stderr)\n            record.update(exit_code=result.returncode, seconds=time.time() - record['start'], load_after=os.getloadavg())\n            records.append(record)\n            (out / 'interleave.json').write_text(json.dumps(records, indent=2) + '\\n')\n            if result.returncode:\n                raise RuntimeError(f'{name} failed: see {name}.log')\n            print(json.dumps(record), flush=True)\nfinally:\n    target.write_bytes(versions['fixed'])\n",
  "fixture_counts": [
    {
      "layout": "root label",
      "sources": 128,
      "reads": 64,
      "labelEntries": 1,
      "collectorCalls": 1
    },
    {
      "layout": "field labels",
      "sources": 128,
      "reads": 64,
      "labelEntries": 64,
      "collectorCalls": 1
    },
    {
      "layout": "root label",
      "sources": 458,
      "reads": 229,
      "labelEntries": 1,
      "collectorCalls": 1
    },
    {
      "layout": "field labels",
      "sources": 458,
      "reads": 229,
      "labelEntries": 229,
      "collectorCalls": 1
    },
    {
      "layout": "root label",
      "sources": 916,
      "reads": 458,
      "labelEntries": 1,
      "collectorCalls": 1
    },
    {
      "layout": "field labels",
      "sources": 916,
      "reads": 458,
      "labelEntries": 458,
      "collectorCalls": 1
    },
    {
      "layout": "root label",
      "sources": 1832,
      "reads": 916,
      "labelEntries": 1,
      "collectorCalls": 1
    },
    {
      "layout": "field labels",
      "sources": 1832,
      "reads": 916,
      "labelEntries": 916,
      "collectorCalls": 1
    },
    {
      "layout": "root label",
      "sources": 2668,
      "reads": 1334,
      "labelEntries": 1,
      "collectorCalls": 1
    },
    {
      "layout": "field labels",
      "sources": 2668,
      "reads": 1334,
      "labelEntries": 1334,
      "collectorCalls": 1
    }
  ],
  "paired_run_metadata": [
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      "exit_code": 0,
      "seconds": 28.24235963821411,
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      ]
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      "exit_code": 0,
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      "exit_code": 0,
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      "load_before": [
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      "exit_code": 0,
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      "load_after": [
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    }
  ],
  "paired_runs": {
    "baseline": [
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        "runtime": {
          "deno": "2.9.4",
          "v8": "15.0.245.2-rusty",
          "typescript": "6.0.3"
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        "results": [
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          {
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          },
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          },
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          },
          {
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          },
          {
            "name": "root label 1832",
            "ms": 1532.942165999999
          },
          {
            "name": "field labels 1832",
            "ms": 2174.6667080000007
          },
          {
            "name": "root label 2668",
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          {
            "name": "field labels 2668",
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        ]
      },
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        "runtime": {
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          "v8": "15.0.245.2-rusty",
          "typescript": "6.0.3"
        },
        "results": [
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            "ms": 7.574708000000101
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          {
            "name": "field labels 128",
            "ms": 10.544874999999593
          },
          {
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          },
          {
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          },
          {
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          },
          {
            "name": "field labels 916",
            "ms": 593.6125420000008
          },
          {
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            "ms": 1786.9760000000006
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          {
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          {
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          {
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          }
        ]
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      {
        "runtime": {
          "deno": "2.9.4",
          "v8": "15.0.245.2-rusty",
          "typescript": "6.0.3"
        },
        "results": [
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            "name": "root label 128",
            "ms": 7.581083000000945
          },
          {
            "name": "field labels 128",
            "ms": 9.060459000000264
          },
          {
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          },
          {
            "name": "field labels 458",
            "ms": 117.76854099999946
          },
          {
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          {
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          {
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          {
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          {
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        ]
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    ],
    "fixed": [
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          "v8": "15.0.245.2-rusty",
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        "results": [
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          {
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          {
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          {
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          {
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          "v8": "15.0.245.2-rusty",
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    "No untouched calibration control.",
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    "encodePointer and isPrefix unchanged."
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}