{
  "date": "2026-11-04",
  "base": "0f5fc16796d6e7882e34722435480320a25434dd",
  "previous_head": "519f221f7ca83cc956c0a03fa9d950be7bedc304",
  "platform": "Apple M4 Pro, macOS arm64, one thread",
  "jdk": "17.0.12",
  "java_release": 11,
  "flink_versions": [
    "1.18.1",
    "2.2.1"
  ],
  "performance_flink_versions": [
    "1.18.1",
    "2.2.1"
  ],
  "build": "release --no-default-features --features mimalloc",
  "scope": "Direct built-in CHAR_LENGTH/CHARACTER_LENGTH of qualified native UPPER/LOWER primitive ASCII results. Includes total integer/BOOLEAN text, direct DECIMAL truth/predicate text and qualified Flink 2.2 primitive PRINTF. General Unicode, unverified producers and further consumers retain their prior routes.",
  "method": {
    "rows_per_trial": 131072,
    "warmups": 16,
    "measurements": 9,
    "bulk_batch": 1024,
    "tiny_batch": 16,
    "input": "Equal GenericRowData/BinaryRowData and Arrow, signed integer extrema, BOOLEAN, compact/noncompact DECIMAL truth/predicates, modern/legacy casts and qualified primitive ASCII formatting; both NULL modes.",
    "native_timer": "Starts/stops inside Rust after import and before export, retaining production Calc, output consumption, allocation, conversions and intrinsic callbacks. Initial JNI/import/export and perimeter transposes are outside this prepared operation only.",
    "previous": "Actual preceding encoder 519f221f, identical common fixture, production TableConfig/context and byte-identical release DSO/executable. Before requires a JVM evaluator; candidate requires empty evaluators. Compiler setup is outside timing.",
    "pipeline": "Twelve million-row bounded row-source/blackhole configurations, one thread, two warmups and five alternating stock/native measurements each. Submission/startup, JNI and both transposes retained. Surrounding JVM startup is outside the job timer.",
    "fixture_configuration": "All successful signatures use the production context-aware scalar encoder even when output is numeric. This passes the same TableConfig/legacy mode used by stock into inner character casts. The old result-type heuristic failed to configure numeric length outputs before any trial; no timings from that failed registration are used. The explicit rejected-signature fallback control retains its diagnostic path."
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  "initial_attempt": null,
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  },
  "limitations": [
    "Only direct length of the existing locale-independent primitive UPPER/LOWER proof is added. General Unicode, bounded text casts, fallible/stateful/unverified producers and dependent expressions retain their prior routes.",
    "PRINTF is absent from released Flink 1.18; those formatter matrix cells run only on 2.2.",
    "All tiny and whole-job losses, independent stock drift, allocation probes and variability are retained. Bulk qualification is not universal full-job acceleration.",
    "Hosted suites must qualify the exact pushed head. Historical per-function records are not relabeled as fresh whole-PR validation."
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        "shape": "decimal-truth",
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    "note": "Four-cell admission pilot uses the same scalar encoder/runtime. Final common fixture only removes unreachable failure-control branches outside either operation. Its original source/bytecode hashes and all samples are retained."
  },
  "final_raw_samples": 9000
}