{
  "base_commit": "a3d62316c69bea6483256eed9a750415758a47a0",
  "machine": "Mac16,7",
  "memory_bytes": 25769803776,
  "jdk": "17.0.12",
  "flink": "2.2.1",
  "whole_job": {
    "profile": "release + mimalloc",
    "parallelism": 2,
    "warmups": 2,
    "runs": 5,
    "window": "TUMBLE 10 seconds",
    "source": "runtime DataStream sequence with nullable BIGINT or DECIMAL(12,2)",
    "sink": "collecting row sink",
    "perimeter": "both row/Arrow transposes included",
    "value": "id % 1024 - 512; decimal input scale 2",
    "nulls": "key 0 and every seventh row",
    "rowtime": "1000 + id % 10000 milliseconds",
    "order": "stock/native order alternated per trial",
    "validation": "values and RowKinds compared after each trial; native window nodes and both transposes required in the sink witness"
  },
  "limitations": [
    "Small jobs include startup and collection polling; sample ranges must be retained.",
    "Stock medians differ between separate process runs. Initial single-phase DECIMAL samples were near parity; the later same-process stock/native/fallback controls demonstrate a gain at 64 and 4096 keys, without proving a universal speedup.",
    "Allocation requests are not peak memory or copied bytes; zero shared output bytes reflects scalar result reconstruction.",
    "The allocation executable uses CountingAllocator over the system allocator; production whole-job builds use mimalloc."
  ],
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