{
  "date": "2026-10-18",
  "base_commit": "4222bc0c6d96c86759cf40c95b44c2165fc47b94",
  "configuration": {
    "flink": "2.2.1",
    "jdk": "11.0.27 runtime; headline candidate and baseline compiled with javac 11.0.27; diagnostic compiler differences are labeled per cohort",
    "host": "Apple M4 Pro ARM64",
    "allocator": "release/mimalloc",
    "heap": "2 GiB",
    "parallelism": 1,
    "warmups": 2,
    "measured_pairs": 5,
    "batch_rows": 1024,
    "measurement": "executeSql(insert).await(); includes source map, both transposes and rowwise blackhole sink; explain and environment construction are outside clock",
    "ordering": "serial separate-JVM cohorts; alternating stock/native within each cohort; no other build/test job launched during these cohorts"
  },
  "native_library_sha256": "921f81bb580fd094019cd48ef29298167d2acce19b91abf4929be7da881e40ca",
  "results": [
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      "type": "INT",
      "native_route": true,
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      "type": "BIGINT",
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      "compiler": "javac 11.0.27"
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    {
      "cohort": "398-main-default",
      "rows": 5000000,
      "type": "INT",
      "native_route": false,
      "stock_trials_s": [
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      "cohort": "398-main-default",
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      "stock_trials_s": [
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      "cohort": "398-main-default",
      "rows": 5000000,
      "type": "STRING",
      "native_route": false,
      "stock_trials_s": [
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      "stock_over_enabled": 0.9978608703161242,
      "compiler": "javac 11.0.27"
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    {
      "cohort": "398-candidate-initial-diagnostic",
      "rows": 5000000,
      "type": "INT",
      "native_route": true,
      "stock_trials_s": [
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      "enabled_trials_s": [
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      "role": "Earlier candidate iteration; retained for transparency, not the headline."
    },
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      "rows": 5000000,
      "type": "BIGINT",
      "native_route": true,
      "stock_trials_s": [
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      "role": "Earlier candidate iteration; retained for transparency, not the headline."
    },
    {
      "cohort": "398-candidate-initial-diagnostic",
      "rows": 5000000,
      "type": "STRING",
      "native_route": true,
      "stock_trials_s": [
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      "stock_median_s": 0.992855,
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      "role": "Earlier candidate iteration; retained for transparency, not the headline."
    },
    {
      "cohort": "398-candidate-final-javac17-diagnostic",
      "compiler": "javac 17, --release 11",
      "role": "Final source, different compiler; retained diagnostic, not headline.",
      "rows": 5000000,
      "type": "INT",
      "native_route": true,
      "stock_trials_s": [
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    {
      "cohort": "398-candidate-final-javac17-diagnostic",
      "compiler": "javac 17, --release 11",
      "role": "Final source, different compiler; retained diagnostic, not headline.",
      "rows": 5000000,
      "type": "BIGINT",
      "native_route": true,
      "stock_trials_s": [
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      "stock_median_s": 0.460524958,
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      "stock_over_enabled": 0.8199177732026491
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    {
      "cohort": "398-candidate-final-javac17-diagnostic",
      "compiler": "javac 17, --release 11",
      "role": "Final source, different compiler; retained diagnostic, not headline.",
      "rows": 5000000,
      "type": "STRING",
      "native_route": true,
      "stock_trials_s": [
        1.036289792,
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      "enabled_trials_s": [
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      "enabled_median_s": 1.483246583,
      "stock_over_enabled": 0.6839827265592292
    },
    {
      "cohort": "398-candidate-final",
      "compiler": "javac 11.0.27",
      "role": "Final source and same JDK 11 compiler/runtime as the baseline; headline candidate.",
      "rows": 5000000,
      "type": "INT",
      "native_route": true,
      "stock_trials_s": [
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      "stock_over_enabled": 0.7649664977422834
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    {
      "cohort": "398-candidate-final",
      "compiler": "javac 11.0.27",
      "role": "Final source and same JDK 11 compiler/runtime as the baseline; headline candidate.",
      "rows": 5000000,
      "type": "BIGINT",
      "native_route": true,
      "stock_trials_s": [
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      "enabled_trials_s": [
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    },
    {
      "cohort": "398-candidate-final",
      "compiler": "javac 11.0.27",
      "role": "Final source and same JDK 11 compiler/runtime as the baseline; headline candidate.",
      "rows": 5000000,
      "type": "STRING",
      "native_route": true,
      "stock_trials_s": [
        0.969287,
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      ],
      "enabled_trials_s": [
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        1.427131125,
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      "stock_median_s": 0.9571185,
      "enabled_median_s": 1.41618175,
      "stock_over_enabled": 0.6758443963848566
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  ],
  "issue": 398,
  "limitations": [
    "Only the existing opt-in path is optimized; default admission remains off.",
    "Separate JVM cohorts and stock control drift limit precise attribution. Stock default STRING timings drift more than the other cohorts; every sample is retained.",
    "Earlier diagnostic runs overlapped compilation/tests and are excluded from the reported isolated cohorts; their logs remain local.",
    "No Rust operational path changes; no new native Criterion fixture is required.",
    "Initial candidate and final-source javac 17 diagnostics are retained but are not used in the headline comparison."
  ],
  "source_sha256": {
    "src/main/java/tech/streamfusion/operator/NativeCalcOperator.java": "4de3d6293b5965503113523554e5aff4736b1210ed0022bffda329069b40dbb7",
    "src/main/java/tech/streamfusion/operator/NativeUdf.java": "261f12b728acf411149fdce7c6f39fb4c25c07797c431889003fadc1ac86e96f",
    "src/test/java/tech/streamfusion/SharedStatefulScalarBenchmark.java": "8e901654ced45d542ea332d9e732ec7ec55583b42b318e39898150026588f6e7"
  },
  "headline_candidate_cohort": "398-candidate-final"
}