{
  "date": "2026-10-27",
  "baseline_revision": "7a6a790e0e885e76ea1360704d6ae92fd86b6f5b",
  "machine": {
    "cpu": "Apple M4 Pro",
    "logical_cpus": 14,
    "os": "macOS aarch64",
    "jdk": "17.0.12+8-LTS-286",
    "flink": "2.2.1",
    "rust": "1.94.0",
    "profile": "release, no-default-features, system allocator, counting allocation wrapper in prepared-input example"
  },
  "method": {
    "prepared_inputs": "stock generated Java on prebuilt GenericRowData/BinaryRowData; previous/native production Calc on prebuilt Arrow RecordBatch; equal values/types/NULLs; setup/import/export/perimeter conversion excluded; intrinsic previous JVM callback retained; full checksum consumed inside each runtime",
    "warmups": 16,
    "measured_trials": 11,
    "rows_per_trial": 131072,
    "engine_order": "rotates flink/previous/native each trial",
    "timers": "Java stock timer inside Java; previous/native timers inside Rust",
    "pipeline": "1M-row INT source -> unary minus -> rowwise blackhole, parallelism 1, both transposes retained; separate sequential stock/previous/native JVMs; two warmups, five measured jobs; plan and consumed NativeCalc checks",
    "input_nullability": "All logical input schemas are nullable. The nullable CLI flag controls the presence of NULL values: every seventh row when true, none when false."
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  "feature": "verified signed integer unary minus in existing native Calc",
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