{
  "date": "2026-11-09",
  "scope": "Qualified keyless Boolean/Decimal128/Date32/Time32 extrema pipelines, with existing standalone performance gate unchanged.",
  "baseline": "Stock Flink is also previous StreamFusion whole-query fallback for these types.",
  "runtime": {
    "flink": "2.2.1",
    "datafusion": "54",
    "arrowRust": "58.4.1",
    "arrowJava": "18.3.0",
    "jdk": "Temurin17",
    "allocator": "mimalloc",
    "optionalRocksdb": false,
    "heapGiB": 8,
    "taskManagers": 1,
    "slots": 8,
    "managedMemoryGiB": 1,
    "finalParallelism": 1
  },
  "method": {
    "timer": "Before executeSql through await and completed JobExecutionResult future.",
    "retainedCosts": [
      "Flink bounded sequence source and deterministic row map",
      "SHA2",
      "planning and submission",
      "RowData to Arrow and Arrow to RowData",
      "JNI",
      "local and final aggregate",
      "blocking Arrow IPC singleton shuffle",
      "blackhole sink and completed job result"
    ],
    "work": "Every native trial asserts rows+2 aggregate input rows; stock asserts zero; both transposes and aggregate/exchange required in plan.",
    "order": "Three warmups and seven retained trials, alternating engine order.",
    "source": "Identical test-only bounded rowwise source on both engines. id%17==0 emits NULL in all four values. value=floorMod(id*48271,cardinality); Boolean=id even; decimal=(10^38-1-value), negative on even ids, scale18; date=value%3652059-719162; time=value%86400000 milliseconds.",
    "query": "SELECT MIN(b),MAX(b),MIN(d),MAX(d),MIN(dt),MAX(dt),MIN(tm),MAX(tm),COUNT(*) FROM extrema WHERE SHA2(CAST(id AS STRING),256) <> ''",
    "limits": "Complete pipeline gains; no isolated aggregate-kernel, remote-network throughput or cheap standalone acceleration claim."
  },
  "cohorts": [
    {
      "rows": 1000000,
      "cardinality": 2147483647,
      "batchRows": 1024,
      "parallelism": 2,
      "capBytes": 134217728,
      "warmups": 3,
      "trials": 7,
      "stockNanos": [
        301201542,
        308163125,
        324850000,
        307991875,
        305662709,
        291205792,
        286486375
      ],
      "nativeNanos": [
        187110458,
        193420667,
        183507041,
        218023417,
        184188917,
        193184125,
        188721750
      ],
      "stockRuntimeMs": [
        260,
        267,
        283,
        271,
        269,
        260,
        255
      ],
      "nativeRuntimeMs": [
        169,
        178,
        168,
        202,
        170,
        179,
        177
      ],
      "stockMedianMs": 305.662709,
      "nativeMedianMs": 188.72175,
      "stockOverNative": 1.6196474916113275
    },
    {
      "rows": 2000000,
      "cardinality": 64,
      "batchRows": 1024,
      "parallelism": 2,
      "capBytes": 134217728,
      "warmups": 3,
      "trials": 7,
      "stockNanos": [
        461665666,
        448270166,
        470560292,
        451205042,
        448008125,
        445283875,
        454459625
      ],
      "nativeNanos": [
        288074291,
        287068792,
        280414167,
        282229083,
        280148917,
        277574000,
        278865875
      ],
      "stockRuntimeMs": [
        422,
        412,
        435,
        417,
        414,
        414,
        424
      ],
      "nativeRuntimeMs": [
        270,
        269,
        266,
        269,
        267,
        265,
        267
      ],
      "stockMedianMs": 451.205042,
      "nativeMedianMs": 280.414167,
      "stockOverNative": 1.609066499125916
    }
  ],
  "releaseLibrarySha256": "e14a0a9b48da975ea1961949e6aee91ef3f2e433e47af5c1f3a4ce68d4a04c9f",
  "sourceSha256": {
    "native/engine/src/bounded_aggregate.rs": "2eea93e8a2d3673a8783adbba0e1d4b2d10c832db4f4f233e3640faecb541785",
    "src/test/java/tech/streamfusion/BatchAggregateJobBenchmark.java": "8ac39c5b9ae974d71181f09e2c4a0ccae798b0a8a0052ef31cd7f31fe674c777",
    "src/test/java/tech/streamfusion/BatchExtremaSourceFactory.java": "ae10a546f4f40bffef384de3e4f29bba0fe974de94f7fe044902f5437042c81c"
  }
}