{
  "date": "2026-10-16",
  "issue": 237,
  "workflow_run": "https://github.com/datafusion-contrib/StreamFusion/actions/runs/38850873034",
  "branch_head": "45d331deb39394f0ffab980535f4f02315a5708f",
  "actual_merge_checkout": "62ccea4c598725c317cc82d61c1a5f26da002e00",
  "source_equivalence": "Verified empty diff between recorded branch head and merge checkout for src/main, the full native tree, root/core/runtime poms, runner and query fixture",
  "variant": "numeric owned-key/write-back cache with cold-key bypass; STRING uncached (before STRING cache experiment)",
  "admitted": false,
  "limitations": [
    "GitHub-hosted Ubuntu runner, four logical CPUs per job; no other own build/test during measurements. Shared physical-host interference is not measured.",
    "Two warmups and five alternating complete-job pairs. All ranges and negative results retained. Broad distinct-key variability prevents a blanket admission.",
    "No separate previous-fallback revision comparison in this run.",
    "Whole-process profiles include both UDAF and builtin SUM controls, warmups, cluster setup and JIT. Inclusive counts overlap; downstream output copying is included under the aggregate ingest call.",
    "Sampled allocations are estimates, not copied bytes, peak memory or Rust heap totals. All profile timings excluded.",
    "Results precede the STRING cache experiment; they do not validate its throughput."
  ],
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        "capacity": 65536,
        "warmup_pairs": 2,
        "pairs": 5,
        "heap": "2 GiB",
        "parallelism": 1,
        "production_ipc": true,
        "both_transposes": true,
        "cluster_lifetime": "per job",
        "boundary": "complete executeSql(insert).await; cluster boot/config outside clock"
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                  440401920
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          }
        },
        {
          "label": "profile-string-distinct",
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                [
                  "core::ptr::drop_in_place<streamfusion::group_agg::GroupAggregator>",
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                  "core::ptr::drop_in_place<streamfusion::state::MemoryStateStore<streamfusion::group_agg::GroupKeyState>>",
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                  881852416
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                  848297984
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                  467664896
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                  457179136
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      ],
      "raw_case_logs": [
        "jvm-aggregate-flink118-bigint-distinct-2026-10-16.log.gz",
        "jvm-aggregate-flink118-bigint-low-2026-10-16.log.gz",
        "jvm-aggregate-flink118-bigint-medium-2026-10-16.log.gz",
        "jvm-aggregate-flink118-int-distinct-2026-10-16.log.gz",
        "jvm-aggregate-flink118-int-low-2026-10-16.log.gz",
        "jvm-aggregate-flink118-int-medium-2026-10-16.log.gz",
        "jvm-aggregate-flink118-profile-int-distinct-2026-10-16.log.gz",
        "jvm-aggregate-flink118-profile-int-medium-2026-10-16.log.gz",
        "jvm-aggregate-flink118-profile-string-distinct-2026-10-16.log.gz",
        "jvm-aggregate-flink118-profile-string-medium-2026-10-16.log.gz",
        "jvm-aggregate-flink118-string-distinct-2026-10-16.log.gz",
        "jvm-aggregate-flink118-string-low-2026-10-16.log.gz",
        "jvm-aggregate-flink118-string-medium-2026-10-16.log.gz"
      ]
    }
  ],
  "preflight_limitation": "Historical v1 benchmark explains only native before timing. Stock/native admission must use corrected symmetric preflight. Profiled NativeJvmGroup stacks remain diagnostic; all profile timings excluded."
}