{
  "measured_at_utc": "2026-09-20T02:09:08.197953+00:00",
  "scope": "CPU demonstration of measurement boundaries, not a GPU or AI benchmark",
  "environment": {
    "python": "3.14.7 (main, Aug  5 2026, 10:29:49) [Clang 21.0.0 (clang-2100.1.1.101)]",
    "implementation": "CPython",
    "os": "Darwin",
    "os_version": "25.3.0",
    "architecture": "arm64",
    "gc_enabled": true,
    "clock": "perf_counter_ns",
    "clock_resolution_seconds": 4.166666666666666e-08,
    "limitations": "Shared developer machine; no CPU affinity, clock lock, thermal or competing-load control"
  },
  "source_sha256": "668f2f45f46f5bf2a2d96cdfc84079a01c03807749b34d5cb443d1e517707cba",
  "input": {
    "construction": "list(range(20000)); compact JSON encoding",
    "elements": 20000,
    "expected_sum": 199990000,
    "json_bytes": 108891,
    "json_sha256": "71ef2792c2e44c5fcdeb513882ec516e88d622ab43af2ed00bc04af625fd2484"
  },
  "protocol": {
    "iterations_per_batch": 50,
    "batches_per_variant": 20,
    "warmup_batches_per_variant": 3,
    "operation_boundary": "sum prebuilt list and check output",
    "job_boundary": "decode in-memory JSON, sum, and check output; decoded-list disposal included",
    "excluded": "process startup, imports, input generation, file/network I/O, report serialization",
    "batch_order": [
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        "operation_loop",
        "operation_builtin",
        "job_loop",
        "job_builtin"
      ],
      [
        "operation_builtin",
        "job_loop",
        "job_builtin",
        "operation_loop"
      ],
      [
        "job_loop",
        "job_builtin",
        "operation_loop",
        "operation_builtin"
      ],
      [
        "job_builtin",
        "operation_loop",
        "operation_builtin",
        "job_loop"
      ],
      [
        "operation_loop",
        "operation_builtin",
        "job_loop",
        "job_builtin"
      ],
      [
        "operation_builtin",
        "job_loop",
        "job_builtin",
        "operation_loop"
      ],
      [
        "job_loop",
        "job_builtin",
        "operation_loop",
        "operation_builtin"
      ],
      [
        "job_builtin",
        "operation_loop",
        "operation_builtin",
        "job_loop"
      ],
      [
        "operation_loop",
        "operation_builtin",
        "job_loop",
        "job_builtin"
      ],
      [
        "operation_builtin",
        "job_loop",
        "job_builtin",
        "operation_loop"
      ],
      [
        "job_loop",
        "job_builtin",
        "operation_loop",
        "operation_builtin"
      ],
      [
        "job_builtin",
        "operation_loop",
        "operation_builtin",
        "job_loop"
      ],
      [
        "operation_loop",
        "operation_builtin",
        "job_loop",
        "job_builtin"
      ],
      [
        "operation_builtin",
        "job_loop",
        "job_builtin",
        "operation_loop"
      ],
      [
        "job_loop",
        "job_builtin",
        "operation_loop",
        "operation_builtin"
      ],
      [
        "job_builtin",
        "operation_loop",
        "operation_builtin",
        "job_loop"
      ],
      [
        "operation_loop",
        "operation_builtin",
        "job_loop",
        "job_builtin"
      ],
      [
        "operation_builtin",
        "job_loop",
        "job_builtin",
        "operation_loop"
      ],
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        "job_loop",
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        "operation_loop",
        "operation_builtin"
      ],
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        "job_loop"
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    ]
  },
  "correctness_cases_passed_per_candidate": 5,
  "samples_ms_per_call": {
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  "summary_ms_per_call": {
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  "ratio_of_medians": {
    "operation_speedup": 3.3654820403028465,
    "job_speedup": 1.175036932121449
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}