{ "date": "2026-11-04", "base": "0f5fc16796d6e7882e34722435480320a25434dd", "previous_head": "60d1e6551668be5445df07b84c95acce8b1b3f60", "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": "Pure native LOWER of proven total integer/BOOLEAN-to-unbounded-STRING casts on both released lines and of qualified primitive ASCII PRINTF on Flink 2.2. Excludes literal I in formatter output to preserve Java locale/cache behavior. No runtime rebuild, transport change or new configuration.", "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; signed integer extrema and BOOLEAN, including modern and legacy Boolean text and qualified literal/indexed/precision/padded PRINTF.", "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 the recorded previous head runs the identical fixture/data/JDK on its saved whole DSO/executable. The candidate runtime artifacts are byte-identical because this extension changes Java admission only. 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