{
  "schema_version": 1,
  "date": "2026-10-21",
  "feature": "Generic FIRST_VALUE/LAST_VALUE values on released Flink 2.2",
  "configuration": {
    "runtime": "JDK 17; release+mimalloc; Linux x86_64",
    "parallelism": 1,
    "heap": "2 GiB",
    "backend": "memory",
    "keys": 64,
    "cardinality": 1024,
    "null_every": 8,
    "warmups": 2,
    "measured_trials": 3,
    "phase": "ONE_PHASE",
    "boundary": "Complete jobs including RowData input, both row/Arrow transposes, JNI, native state, output consumption and rowwise blackhole sink; planning excluded. Timings run alone.",
    "query": "SELECT k, FIRST_VALUE([DISTINCT] v), LAST_VALUE([DISTINCT] v) FROM src GROUP BY k",
    "retract_input": "Three quarters inserts followed by retractions of the first quarter; see GroupedValueBenchmark"
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}