{
  "id": "FI_RECORDER_EFFICIENCY_SECTION_20261008_R1",
  "date": "2026-10-08",
  "evidence_type": "Conditional reviewed source-design arithmetic; no runtime or hardware measurement",
  "comparison": "Earlier R23 source design versus revised R24 source design for the same original record task",
  "task": {
    "payload_bytes": 64,
    "records_per_second": 1,
    "days": 30,
    "records": 2592000,
    "durable_logs": 2,
    "stored_record_bytes": 88,
    "exact_final_host_output_bytes": 228096016,
    "original_commit_deadline_seconds": 1,
    "original_restart_deadline_seconds": 5,
    "original_clock_accuracy_seconds": "0.1",
    "full_original_service_qualified": false
  },
  "metrics": [
    {"metric": "Reserved recorder storage", "before": 1153112064, "after": 862808256, "unit": "bytes", "reduction_percent": "25.1756804098", "scope": "Recorder logical source allocation; other owners and native overhead excluded"},
    {"metric": "Normal capture writes", "before": 580608000, "after": 518400000, "unit": "bytes", "reduction_percent": "10.7142857143", "scope": "Normal recorder logical bytes; retries, physical writes and wear amplification excluded"},
    {"metric": "Normal capture reads", "before": 1410048000, "after": 1161216000, "unit": "bytes", "reduction_percent": "17.6470588235", "scope": "Normal recorder logical bytes; not measured energy or native traffic"},
    {"metric": "Timing-certificate checksum work", "before": 1658880000, "after": 663552000, "unit": "bitsteps", "reduction_percent": "60", "scope": "Named certificate CRC subset; not total CPU use, cycles, time or energy"},
    {"metric": "Routine recovery reads before appends", "before": 656580608, "after": 8391072, "unit": "bytes", "reduction_percent": "98.7220042904", "scope": "Conditional immutable-prefix fast path; not native five-second recovery proof"},
    {"metric": "Recorder plus equal full producer retention", "before": 1453784064, "after": 1163480256, "unit": "bytes", "reduction_percent": "19.9688396089", "scope": "Named two-owner logical allocation only; 300672000-byte producer store charged in both arms"},
    {"metric": "Normal recorder durability sync calls", "before": 15552000, "after": 15552000, "unit": "calls", "reduction_percent": "0", "scope": "Unchanged six-per-record recorder calls"},
    {"metric": "Complete final host output", "before": 228096016, "after": 228096016, "unit": "bytes", "reduction_percent": "0", "scope": "Complete ordered history and terminal; host verification and costs additional"}
  ],
  "storage_working": "1153112064 - 228096000 unused local staging - 62208000 redundant proof + 192 checked namespace = 862808256 bytes",
  "percentage_rule": "100 * (before - after) / before, at each stated metric scope",
  "conditions": [
    "Compact timing proof retains event, commit, CRC and marker; identity and sequence rely on the checked immutable namespace, fixed slots, authentic run/issuer and original source premises.",
    "Routine recovery depends on stable-zero storage, one writer and no alteration of synced bytes. It defers exhaustive historical/future corruption checking outside these premises.",
    "Full diagnostic recovery remains available at 594374304 bytes before appends and 594374496 bytes after appends.",
    "Full producer retention, host verification, native overhead, initialization, terminal work, faults, retries, power, installed kit and lifecycle costs remain required.",
    "A capable ordinary redesign receives the same generic improvements. FI-specific advantage and numerical ROI are not established.",
    "Actual capture/protocol/clock/media/power/host and installed-kit identities and guarantees remain external inputs. Full original service and installed gains are not qualified."
  ],
  "no_claims": ["Measured speed", "Whole-device CPU reduction", "Whole-device energy or heat reduction", "Battery-life improvement", "Actual chip removal", "Qualified installed size or weight saving", "Exclusive FI competitive advantage"],
  "source_bindings": [
    {"document": "R24 final root adoption R1", "sha256": "d3d3c5a96022f353a9237e5da8a23e9418025ad66b8631eed3acf1ecf0378eed"},
    {"document": "R24 final integrated verdict R1", "sha256": "1465e75b435452ec321e7bf59069e5755aeadd05242dc9b0d8acbe148aa020c6"},
    {"document": "R24 resource and workings R1", "sha256": "37582e5628b93841f77837673f7da0f0a08064ecd7e7866a81e94096ee01290c"}
  ]
}