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default features, mimalloc", "prepared_boundary": "Generated released Java on prepared GenericRowData/BinaryRowData; production Calc on prepared Arrow timed in Rust. Equal TRUE-count checksums. JNI perimeter and row/Arrow transposes outside the small-operation timer. Intrinsic previous JVM callback included.", "previous": "Independently compiled encoder from base, actual generated evaluator registration required", "corpora": "ASCII bodies with 16/128 characters; mixed ASCII, BMP letters, mixed Unicode and supplementary-letter rejection with 16-character bodies; varying prefix and optional NULL every seven rows", "pipeline": "1000000 nullable Unicode/mixed strings; rowwise sequence/map source, BOOLEAN NOT NULL blackhole, parallelism 1, two warmups/five measurements, production JNI and both transposes included", "timing_order": "Serial, alternating paired engines, separate stock controls retained", "initialization": "Worker-JDK 8 KiB character bitmap copied once during expression compilation, outside prepared timers; no batch/row JNI calls in the candidate classifier", "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": "459e1ecc" }, "rust_validation": { "release_default_mimalloc": { "passed": 1003, "failed": 0, "ignored": 2 }, "focused_no_default": { "passed": 2, "failed": 0 } } }