{
  "date": "2026-10-15",
  "issue": 363,
  "base_commit": "7aeb0c677d929d6c1922cae451db4dadda4e2271",
  "fallback_commit": "c81600272d4705302a150d5d51d89f69c5960bdc",
  "fallback_note": "The later 7aeb0c67 commit adds only UNION cache tests/docs; production fallback is unchanged.",
  "configuration": {
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    "jdk": "17",
    "native_build": "release+mimalloc",
    "parallelism": 1,
    "heap": "2 GiB",
    "batch_rows": 1024,
    "local_exchange": "production IPC",
    "source": "Runtime row source, partition id modulo keys, nullable sort value every 31 rows; sort values rise/fall by source-id/keys",
    "sink": "Flink blackhole row sink",
    "measurement": "Complete executeSql().await(), including source/sink, both transposes, JNI, all retained state and rank-update output",
    "warmups": 2,
    "measured_pairs": 5,
    "engine_order": "Alternates each trial",
    "stock_checkpointing": "disabled",
    "native_assertions": [
      "NativeColumnarTopN",
      "RowDataToArrow",
      "ArrowToRowData",
      "positive NativeColumnarTopN input metrics"
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    "previous_fallback_assertion": "zero native substitutions",
    "cpu": "12th Gen Intel(R) Core(TM) i7-12650H",
    "task_off_heap_budget": "48 GiB for each engine via the metrics fixture; a configured budget, not reserved or allocated physical memory",
    "metrics_lifetime": "One metrics reporter and local MiniCluster per job, closed after timing and native consumption assertion; no gauges retained across jobs. The JVM and its 2 GiB heap are shared across warmup/measured jobs.",
    "state_backend": "Flink default heap; resident native Top-N store",
    "idle_state_ttl_millis": 0
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  "limitations": [
    "Separate JVM stock controls drift; cross-run comparisons are descriptive, not isolated attribution.",
    "Every completed warmup and measured trial is retained.",
    "Increasing and decreasing arrivals emit different quantities of rank changes; compare engines only within the same fixture.",
    "No timing from the initial Criterion run overlapping the docs build is used.",
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    "candidate-int-131072": {
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  },
  "criterion_configuration": {
    "build": "release Rust with default allocator",
    "samples": 10,
    "warmup_seconds": 0.1,
    "measurement_seconds": 0.2,
    "boundary": "Fresh ranker and production push/output materialization; input setup and independent cardinality oracle excluded"
  },
  "source_sha256": {
    "native/engine/src/topn.rs": "1bfeb998aad6495438545e14cb87e48c9af2e7d430839e624df7e6ecd8562624",
    "native/engine/src/topn/non_time_row_number_tests.rs": "8414f98e9347018b0ae8c33509d50f62024fe05321b1ec013b55a8af7eafeab0",
    "native/engine/src/bench.rs": "bb0f9c93bfc34bf626f22427a77555afa0a60459e0cca9755116abbca41e5b58",
    "native/engine/benches/non_time_row_number.rs": "d9162e1a8649cf77bc9e6b5c8e1ad7a238a494151e3d4d0133106688103cc1c5",
    "src/main/java/tech/streamfusion/planner/NonTimeRowNumberMatcher.java": "5faffdd31790f8caca89bc79db8b5a1a705dc59267c50f4aae16f7fd0447c07c",
    "src/main/java/tech/streamfusion/planner/NativeColumnarTopNExecNode.java": "5d4b73719871a9030174193720f637528788005d2d70b2ae93a8a4fb7f4a16aa",
    "src/main/java/tech/streamfusion/planner/StreamPhysicalNativeColumnarTopN.java": "cd95cd50aea60cff63b504053afd76995bbf7ac28494a0500906cb0c045d1b83",
    "src/main/java/tech/streamfusion/operator/NativeColumnarTopNOperator.java": "06a268065066e82297e106541a4d1c54c0e3d1d7b6aea718470d833fd3ac18e3",
    "src/main/java/tech/streamfusion/Native.java": "22feaebd4a82f83003f1611e2124092067aee2afe51498a60fee59e83e5129d4",
    "src/test/java/tech/streamfusion/FlinkNonTimeRowNumberSqlHarnessTest.java": "80d16f07a83f9c32b3995ecd8d053d352db036695bf4199907203766f6cf5af5",
    "src/test/java/tech/streamfusion/NonTimeRowNumberBenchmark.java": "2662d27aebe8cab38b01b70823853a7aebc4d03ffeea6bba66f38d9eabd373e5"
  },
  "native_library_sha256": "09faf91ad982338d21b63f602806a1a36f4bdb83565c75a958a68565d9c20f08",
  "native_library_note": "Pinned release+mimalloc build contains the production row-identity emission mode. Subsequent Rust source edits expose the benchmark adapter, add test modules and format existing code; emission and state logic are unchanged.",
  "queries": {
    "BIGINT": "SELECT k, v, id, ROW_NUMBER() OVER (PARTITION BY k ORDER BY v ASC NULLS FIRST) AS rn FROM src",
    "INT": "SELECT k, v, id, ROW_NUMBER() OVER (PARTITION BY k ORDER BY CAST(v AS INT) ASC NULLS FIRST) AS rn FROM src"
  }
}
