{
  "date": "2026-10-18",
  "scope": "Computed UNNEST, complete Flink jobs; experimental losses retained",
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    "native": "release/mimalloc",
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    "heap_gib": 2,
    "batch_rows": 1024,
    "zeroCopyLocal": false,
    "warmups_per_engine": 2,
    "measured_trials_per_engine": 3,
    "keys_default": 4096,
    "session_zone": "America/New_York",
    "timing": "executeSql through completion; environment, source/table setup and initial explain outside timing",
    "boundary": "RowData source, both transposes, JNI, production IPC exchange, native state where grouped, row blackhole sink",
    "scheduling": "Sequential idle-machine profiles; alternating engine order; a separate metrics cluster per job",
    "assertions": "NativeUnnest/NativeCalc and both transposes in INSERT plan; consumed native rows; prior revision has zero substitutions"
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  "source_sha256": {
    "initial_and_projected": "51cbdc132bf072cbd81d4df95a68ae381ad0efd39494ca1726d3e17f74946802",
    "constructor_epoch_prior_epoch": "2bfb223908584f026eb1161bf8be7cced3ddb5759ebbc05e3de17031bdb51060",
    "final_prior": "de7a1dd583ce89f7ea1d629d26e74ab02aeb8416527b440ac28c6bd088c20102",
    "typed_validation": "8dd2edf45e31b10518513f107ac34761f4a2b3a0a5c27f82500a244bad89e801"
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    "projected": "3d03f5f8c9d8fba6aae1c80814848d98cbd4f0ea2b3c8c1a5876a669f891db7a",
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    "Initial, projected and constructor phases are retained intermediate implementations; temporal losses required further optimization.",
    "Final native library excludes unrelated unshipped aggregate experiments. Prior production code and native library remain frozen.",
    "All phases retain identical query/data/resource settings for each named profile. Fixture expansion added typed cases without changing original cases.",
    "Separate JVM controls expose stock drift. Profiled diagnostic durations are excluded from these trials."
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  "correctness": {
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      "checks": 157,
      "skipped": 0,
      "failures": 0
    },
    "flink_1_18": {
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      "skipped": 14,
      "failures": 0
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    "native_release_tests": {
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      "unnest": 7
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    "criterion_smoke_fixtures": 156,
    "utc_date_oracle_comparisons_per_released_version": 100002
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    "native_fixture_allocations": "computed-unnest-allocations-2026-10-18.csv",
    "allocation_scope": "Production native kernels through Criterion smoke fixtures; requested bytes and shared buffers are not bytes copied; fixtures constructed outside execution"
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