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"seconds": 0.203178208 }, { "engine": "previous", "trial": 6, "warmup": false, "rows": 1000000, "seconds": 0.33134575 } ] } }, "alpha_shared_regression": [ { "line": "22", "corpus": "ascii", "width": 16, "nullable": false, "binary_rows": false, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 17.325401306152344, "median_ns_per_row": 18.8582763671875, "max_ns_per_row": 29.22662353515625 }, "native": { "min_ns_per_row": 6.5155029296875, "median_ns_per_row": 6.722450256347656, "max_ns_per_row": 7.05877685546875 } } }, { "line": "22", "corpus": "ascii", "width": 128, "nullable": false, "binary_rows": false, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 55.79534912109375, "median_ns_per_row": 57.11205291748047, "max_ns_per_row": 75.62637329101562 }, "native": { "min_ns_per_row": 38.439117431640625, "median_ns_per_row": 40.819801330566406, "max_ns_per_row": 44.22601318359375 } } }, { "line": "22", "corpus": "unicode", "width": 16, "nullable": true, "binary_rows": true, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 58.530174255371094, "median_ns_per_row": 62.047325134277344, "max_ns_per_row": 72.83782958984375 }, "native": { "min_ns_per_row": 14.093711853027344, "median_ns_per_row": 14.382682800292969, "max_ns_per_row": 14.577865600585938 } } }, { "line": "22", "corpus": "bmp", "width": 16, "nullable": false, "binary_rows": false, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 28.064727783203125, "median_ns_per_row": 28.25323486328125, "max_ns_per_row": 40.92662048339844 }, "native": { "min_ns_per_row": 14.966964721679688, "median_ns_per_row": 15.722908020019531, "max_ns_per_row": 16.669273376464844 } } }, { "line": "118", "corpus": "ascii", "width": 16, "nullable": false, "binary_rows": false, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 17.39025115966797, "median_ns_per_row": 19.638694763183594, "max_ns_per_row": 27.657508850097656 }, "native": { "min_ns_per_row": 6.0577392578125, "median_ns_per_row": 6.76568603515625, "max_ns_per_row": 7.116950988769531 } } }, { "line": "118", "corpus": "ascii", "width": 128, "nullable": false, "binary_rows": false, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 56.51409912109375, "median_ns_per_row": 58.965362548828125, "max_ns_per_row": 69.6420669555664 }, "native": { "min_ns_per_row": 40.644012451171875, "median_ns_per_row": 43.663658142089844, "max_ns_per_row": 44.61924743652344 } } }, { "line": "118", "corpus": "unicode", "width": 16, "nullable": true, "binary_rows": true, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 61.04723358154297, "median_ns_per_row": 63.02833557128906, "max_ns_per_row": 80.09815216064453 }, "native": { "min_ns_per_row": 15.019096374511719, "median_ns_per_row": 15.278495788574219, "max_ns_per_row": 17.56604766845703 } } }, { "line": "118", "corpus": "bmp", "width": 16, "nullable": false, "binary_rows": false, "batch_rows": 1024, "results": { "flink": { "min_ns_per_row": 27.716957092285156, "median_ns_per_row": 29.866851806640625, "max_ns_per_row": 49.08307647705078 }, "native": { "min_ns_per_row": 15.788078308105469, "median_ns_per_row": 17.339706420898438, "max_ns_per_row": 18.389068603515625 } } } ], "method": { "native_build": "release, default features, mimalloc", "prepared_boundary": "Released generated Java on prepared GenericRowData/BinaryRowData; production Calc on equivalent Arrow timed inside Rust with equal TRUE-count checksums. Perimeter JNI/import/export and both transposes are outside the small-operation timer; intrinsic previous JVM callback is inside.", "previous": "Actual independently compiled main encoder from base, requiring generated evaluator registration", "corpora": "ASCII digit bodies 16/128 characters; mixed ASCII, BMP digits, mixed Unicode digits and supplementary-digit rejection with 16-character bodies; varying prefixes, optional NULL every seven rows", "pipeline": "1000000 nullable mixed Unicode digit strings; rowwise source, BOOLEAN NOT NULL blackhole, parallelism 1, two warmups, five measurements, production JNI and both transposes included", "initialization": "Worker JDK 8 KiB BMP digit bitmap copied once during expression compilation, outside prepared timers; candidate classifier has no row/batch JVM calls", "timing_order": "Serial, alternating paired engines, independent previous/candidate stock controls retained", "alpha_regression": "Eight 1024-row alpha controls after sharing initialization, 16 warmups/nine trials, same boundaries; raw trials in string-alpha-shared-2026-11-01.csv.gz", "logical_nullability": "Historical nullable Java/encoder signatures for all data populations; nullable selects data NULLs, and Arrow field metadata follows batch validity. Separate matching NOT NULL signature controls are in classification-not-null-2026-11-01.json.", "source_commit": "a8507dc3" } }