{
  "date": "2026-11-04",
  "base": "0f5fc16796d6e7882e34722435480320a25434dd",
  "previous_head": "5e18ac8d265446d2b509b8bf0b525aa4593a111b",
  "platform": "Apple M4 Pro, macOS arm64, one thread",
  "jdk": "17.0.12",
  "java_release": 11,
  "flink_versions": [
    "1.18.1",
    "2.2.1"
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  "performance_flink": "2.2.1",
  "build": "release --no-default-features --features mimalloc",
  "scope": "Elide unbounded CAST/TRY_CAST of a proven total integer to STRING inside the primitive ASCII formatter. Validate conversions against the logical STRING argument first, then format the underlying integer in native buffers. General string/Boolean conversions match; numeric conversions remain invalid for STRING. No runtime rebuild or transport change.",
  "method": {
    "rows_per_trial": 131072,
    "warmups": 16,
    "measurements": 9,
    "bulk_batch": 1024,
    "tiny_batch": 16,
    "input": "Equal prepared GenericRowData/BinaryRowData and Arrow; both NULL modes; TINYINT/SMALLINT/INT/BIGINT extrema, independently nullable BOOLEAN/mixed integers, total computed wrapping, CAST/TRY_CAST text, literal/indexed/precision/padded/general Boolean formats.",
    "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": "The actual preceding encoder/helper from 5e18ac8d runs the identical fixture/data/JDK on its saved whole DSO/executable. The candidate native artifacts are byte-identical because this extension changes Java admission only. Both runtime paths require consumed operations; only the new route requires empty evaluators.",
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  },
  "limitations": [
    "PRINTF exists only on released Flink 2.2; 1.18 SQL rejection remains outside the native backlog.",
    "Format <=512 ASCII characters, width/precision <=256; actual argument-specific JDK validation and index-zero rejection remain. Other formats/argument families retain preceding routes.",
    "Only total integer-to-unbounded-STRING CAST/TRY_CAST is elided, with actual logical STRING conversion validation. Bounded CHAR/VARCHAR, Boolean/decimal text casts, arbitrary STRING fields, failing/unverified producers and unsupported formats retain previous behavior. Existing proven ASCII length/comparison consumers reuse the same producer proof; no new general consumer/boundary admission.",
    "Complete-job measurements retain all slower/overlapping cases; prepared gains do not establish universal job acceleration.",
    "This extension has focused local JVM verification; full hosted suites must qualify the exact pushed head separately."
  ]
}
