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      "batch_rows": 1024,
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      "binary_rowdata": true,
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  ],
  "pipeline": {
    "flink": {
      "unit": "seconds",
      "median": 0.131442,
      "min": 0.125461041,
      "max": 0.149768708,
      "trials": [
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    },
    "previous": {
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    },
    "native": {
      "unit": "seconds",
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  },
  "limitations": [
    "16-row controls remain slower than stock because of generic native Calc fixed overhead.",
    "Complete jobs include submission/JIT/startup; no sustained complete-job acceleration claim."
  ],
  "profiling": {
    "method": "Separate native-only nullable INT, 16-row control, five-second 1ms process sample; outside throughput trials.",
    "observations": [
      "Native Calc evaluation and RecordBatch projection/bookkeeping remain visible with shared output buffers.",
      "Allocation/free, Arc ownership and result checksum consumption remain fixed costs.",
      "There is no rounding kernel or JVM function execution on the candidate path; the sample is diagnostic, not a universal percentage estimate."
    ]
  }
}