{
  "date": "2026-11-09",
  "status": "valid: matching ASC NULLS FIRST; order-sensitive hash including NULL positions checked against sorted reference",
  "correction": "Earlier operation comparisons are invalid because the host SortSpec flag meant NULLS LAST. They remain marked discarded in the original JSON files. Complete-job comparisons are unaffected.",
  "configuration": {
    "poolBytes": 33554432,
    "warmups": 3,
    "trials": 7,
    "nativeBatchRows": 1024,
    "seed": 724719,
    "alternatingOrder": true,
    "types": "all nullable BIGINT",
    "build": "release, mimalloc, no optional RocksDB",
    "environment": "same host/Flink2.2.1/JDK17 as batch-sort-jobs-20261109.json"
  },
  "timing": "Same prepared RowData/Arrow operation boundaries; Rust timer after import before export, includes compact ownership copies, state, I/O yields and equivalent ordered key-hash consumption.",
  "cohorts": [
    {
      "rows": 131072,
      "width": 4,
      "cardinality": 131072,
      "nullsFirst": true,
      "nullEvery": 17,
      "offset": 0,
      "fetch": null,
      "validComparison": true,
      "stockNanos": [
        41970042,
        25619208,
        25590375,
        25003917,
        24524459,
        24369959,
        23093583
      ],
      "nativeNanos": [
        3574042,
        3474542,
        3493041,
        3503334,
        3637250,
        3582666,
        3312500
      ],
      "medianStockOverNative": 7.137177614238323
    },
    {
      "rows": 65536,
      "width": 8,
      "cardinality": 127,
      "nullsFirst": true,
      "nullEvery": 17,
      "offset": 0,
      "fetch": null,
      "validComparison": true,
      "stockNanos": [
        13571000,
        9987917,
        10227875,
        11337709,
        11079959,
        11055250,
        10284917
      ],
      "nativeNanos": [
        2130708,
        2082458,
        2062458,
        2050083,
        1977791,
        1973542,
        2022666
      ],
      "medianStockOverNative": 5.3925865440569964
    }
  ],
  "nativeLibrarySha256": "a4358bc0249671a3d1c6928714d2be814a4636db64a3a0ca5ca36069c24231fc",
  "sourceFingerprints": {
    "native/engine/src/bounded_sort.rs": "85dd35ff60c6ff2cf2c02f5689bbb77f4d841efddc9c353c5fd7154204c8474c",
    "src/test/java/tech/streamfusion/operator/BatchSortAdmissionBenchmark.java": "00a568a1ee1c0c4b2b3e156802ab7b107b4e2a094d4dfa942d22f0f496d3c9e4"
  }
}