{
  "schema_version": 1,
  "date": "2026-10-13",
  "base_revision": "a3d62316c69bea6483256eed9a750415758a47a0",
  "environment": {
    "cpu": "Apple M4 Pro",
    "platform": "macOS aarch64",
    "flink": "2.2.1",
    "jdk": "Java HotSpot 17.0.12",
    "native": "release with mimalloc",
    "timezone": "UTC",
    "parallelism": 2,
    "shuffle": "Arrow IPC (zeroCopyLocal=false)"
  },
  "methodology": {
    "sql": "SELECT k, window_start, window_end, MIN(s), MAX(s), COUNT(*) FROM TABLE(TUMBLE(TABLE src, DESCRIPTOR(rt), INTERVAL '10' SECOND)) GROUP BY k, window_start, window_end",
    "boundary": "SQL submission through rowwise collection in one shared MiniCluster; both transposes, scheduling, JNI and IPC remain timed; cluster startup and input view registration are outside timing",
    "warmup_per_engine": 2,
    "measured_per_engine": 5,
    "engine_order": "stock/native/previous fallback rotate each trial",
    "source": "Runtime sequence; bounded-out-of-orderness watermarks; nullable STRING with 1/7 NULL and one all-NULL key; values vary within each key",
    "previous_behavior": "Disable all three window aggregate switches and require zero native substitutions, reproducing prior whole-query host fallback",
    "validation": "Compare values and RowKinds each trial; require both transposes and expected native window nodes; consumed-row metrics are restricted to the current native job ID",
    "limitations": [
      "Local repeated complete jobs are not isolated aggregate throughput or a production SLA.",
      "Desktop background processes remain running; no competing Codex build/test/benchmark ran during each timed comparison.",
      "Some two-million-row samples vary by approximately 0.1 seconds; the retained 20-million-row control tests a longer boundary. These runs do not supply statistical confidence for end-to-end throughput.",
      "The admission-only prototype is an unshipped performance diagnostic, not previous native coverage. Criterion comparisons use matching native fixtures and exclude JVM/JNI costs."
    ]
  },
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