{
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      "dso_sha256": "caf07e7c5f0050f90545924c72cb68bac8b9da6cec51556e3ba02c988ce604de",
      "measurements": [
        "[append-top1-window] engine=Flink trial=0 backend=rocksdb keys=65536 width=8 improving=true before=666515 after=1795711 seconds=10.000274 mean_rows_per_second=112916.510",
        "[append-top1-window] engine=StreamFusion trial=0 backend=rocksdb keys=65536 width=8 improving=true before=610304 after=1753088 seconds=10.000372 mean_rows_per_second=114274.148",
        "[append-top1-window] engine=StreamFusion trial=1 backend=rocksdb keys=65536 width=8 improving=true before=679936 after=1904640 seconds=10.000330 mean_rows_per_second=122466.360",
        "[append-top1-window] engine=Flink trial=1 backend=rocksdb keys=65536 width=8 improving=true before=504591 after=1759083 seconds=10.000492 mean_rows_per_second=125443.033",
        "[append-top1-window] engine=Flink trial=2 backend=rocksdb keys=65536 width=8 improving=true before=713807 after=1851096 seconds=10.000390 mean_rows_per_second=113724.460",
        "[append-top1-window] engine=StreamFusion trial=2 backend=rocksdb keys=65536 width=8 improving=true before=643072 after=1888256 seconds=10.000319 mean_rows_per_second=124514.431",
        "[append-top1-sustained] backend=rocksdb keys=65536 width=8 improving=true warmup_seconds=5 window_seconds=10 stock_mean=117361.335 sf_mean=120418.313 stock_trials=[112916.51025423825, 125443.0333835548, 113724.46024256191] sf_trials=[114274.14756185644, 122466.36020217602, 124514.43064181991]"
      ],
      "width": 8
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    "native/engine/src/topn/append_top1.rs": "9565607966f1fe41b333f0bf44fcb121027bfe7e1f37b6b15dba2addb5460a61",
    "native/engine/src/state/rocks_config.rs": "399ccdd9ea6feddb465b427de02662da47238a12eb4cecde0034eb75aefab330",
    "native/engine/src/state/rocks_store/mod.rs": "f1a9778be16e7e3c5dc3b840c41861edfa427f77f7d70ae3fb7ed8a8d2bc1b82",
    "native/engine/src/state/rocks_store/decoded_cache.rs": "5fb2dae46a76bc1e14043a278daa91402dd2636a9821a20b8d07d20fc3d60f0f",
    "src/main/java/tech/streamfusion/operator/NativeColumnarTopNOperator.java": "a267b207fec8377035fea62fa68e6c69b251fe083117b3fb41c5992863d349e7"
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  "benchmark_source_sha256": {
    "src/test/java/tech/streamfusion/AppendTop1SustainedBenchmark.java": "8048864cec346da8032a1e4098197dc7585e885df212b37edb63eef6864b86f8",
    "src/test/java/tech/streamfusion/AppendTop1Benchmark.java": "44460ffda9bb1b63a24137ffb75801c7d26aa9e13da16ed4f131e588bd920689",
    "src/test/java/tech/streamfusion/BasicTypeBenchmark.java": "5d5fd7c777ca43719be9f307426271d49a0d6898b4c11d8d7db6567bfd1fcf62",
    "src/test/java/tech/streamfusion/RecoveryExecutionMetrics.java": "c7585e3f87ccd0f6aa46be3c607ef645b597735e843a6998630f20d33b32cd0b"
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  "bounded_unique_invocations": [
    {
      "version": "prior",
      "backend": "rocksdb",
      "unique_keys": true,
      "exit_code": 0,
      "log": "streamfusion-317-final-unique-prior-rocksdb.log",
      "measurements": [
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=rocksdb Flink=407.860549s StreamFusion=75.744623s stock_trials=[446.587018036, 407.860548871, 407.495004753] sf_trials=[57.343086802, 75.775213762, 75.744623114]"
      ]
    },
    {
      "version": "candidate",
      "backend": "rocksdb",
      "unique_keys": true,
      "exit_code": 0,
      "log": "streamfusion-317-final-unique-candidate-rocksdb.log",
      "measurements": [
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=rocksdb Flink=481.514276s StreamFusion=20.483789s stock_trials=[527.931601739, 478.706178118, 481.514275624] sf_trials=[20.483789055, 20.625819458, 20.337910375]"
      ]
    },
    {
      "version": "prior",
      "backend": "memory",
      "unique_keys": true,
      "exit_code": 0,
      "log": "streamfusion-317-final-unique-prior-memory.log",
      "measurements": [
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=4.766844s StreamFusion=5.344268s stock_trials=[4.632517411, 4.76684409, 5.081969504] sf_trials=[5.344268047, 5.022465068, 5.796191954]"
      ]
    },
    {
      "version": "candidate",
      "backend": "memory",
      "unique_keys": true,
      "exit_code": 0,
      "log": "streamfusion-317-final-unique-candidate-memory.log",
      "measurements": [
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=3.968224s StreamFusion=5.001448s stock_trials=[6.411553522, 3.968223722, 3.55612091] sf_trials=[6.186246111, 5.001448455, 4.726056291]"
      ]
    }
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  "correctness_v5": {
    "flink_1_18_1": {
      "tests": 79,
      "failures": 0,
      "errors": 0,
      "skips": 0
    },
    "flink_2_2_1": {
      "tests": 79,
      "failures": 0,
      "errors": 0,
      "skips": 0
    },
    "native": {
      "passed": 679,
      "ignored": 2
    },
    "criterion_smoke": 208
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  "v6_candidate_library_sha256": "e672251494db2eeb3dabe2fa226ebd207091b5b8c9fb7301cc422bad241f3d5f",
  "v6_fresh_unique_memory": [
    {
      "ticket": 317,
      "version": "prior",
      "trial": 0,
      "exit_code": 0,
      "library_sha256": "caf07e7c5f0050f90545924c72cb68bac8b9da6cec51556e3ba02c988ce604de",
      "log": "streamfusion-317-fresh-prior-memory-0.log",
      "measurements": [
        "[basic-type-trial] case=append-top1 engine=Flink trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=6.462346",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=12.798748",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=9.697043",
        "[basic-type-trial] case=append-top1 engine=Flink trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=4.844513",
        "[basic-type-trial] case=append-top1 engine=Flink trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=19.071254",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=5.767015",
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=19.071254s StreamFusion=5.767015s stock_trials=[19.071254248] sf_trials=[5.767014972]"
      ]
    },
    {
      "ticket": 317,
      "version": "candidate",
      "trial": 0,
      "exit_code": 0,
      "library_sha256": "e672251494db2eeb3dabe2fa226ebd207091b5b8c9fb7301cc422bad241f3d5f",
      "log": "streamfusion-317-fresh-candidate-memory-0.log",
      "measurements": [
        "[basic-type-trial] case=append-top1 engine=Flink trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.397683",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.872655",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.409626",
        "[basic-type-trial] case=append-top1 engine=Flink trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=4.529502",
        "[basic-type-trial] case=append-top1 engine=Flink trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=4.155875",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=4.928069",
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=4.155875s StreamFusion=4.928069s stock_trials=[4.155875263] sf_trials=[4.928069204]"
      ]
    },
    {
      "ticket": 317,
      "version": "candidate",
      "trial": 1,
      "exit_code": 0,
      "library_sha256": "e672251494db2eeb3dabe2fa226ebd207091b5b8c9fb7301cc422bad241f3d5f",
      "log": "streamfusion-317-fresh-candidate-memory-1.log",
      "measurements": [
        "[basic-type-trial] case=append-top1 engine=Flink trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.482360",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=6.331252",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.301913",
        "[basic-type-trial] case=append-top1 engine=Flink trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=4.602800",
        "[basic-type-trial] case=append-top1 engine=Flink trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=4.950620",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=5.326029",
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=4.950620s StreamFusion=5.326029s stock_trials=[4.950620049] sf_trials=[5.326028843]"
      ]
    },
    {
      "ticket": 317,
      "version": "prior",
      "trial": 1,
      "exit_code": 0,
      "library_sha256": "caf07e7c5f0050f90545924c72cb68bac8b9da6cec51556e3ba02c988ce604de",
      "log": "streamfusion-317-fresh-prior-memory-1.log",
      "measurements": [
        "[basic-type-trial] case=append-top1 engine=Flink trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=6.029657",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=7.441292",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=6.439385",
        "[basic-type-trial] case=append-top1 engine=Flink trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=4.114718",
        "[basic-type-trial] case=append-top1 engine=Flink trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=4.429650",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=5.858074",
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=4.429650s StreamFusion=5.858074s stock_trials=[4.429649574] sf_trials=[5.858074279]"
      ]
    },
    {
      "ticket": 317,
      "version": "prior",
      "trial": 2,
      "exit_code": 0,
      "library_sha256": "caf07e7c5f0050f90545924c72cb68bac8b9da6cec51556e3ba02c988ce604de",
      "log": "streamfusion-317-fresh-prior-memory-2.log",
      "measurements": [
        "[basic-type-trial] case=append-top1 engine=Flink trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=4.998565",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=6.858164",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.308558",
        "[basic-type-trial] case=append-top1 engine=Flink trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=3.814858",
        "[basic-type-trial] case=append-top1 engine=Flink trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=4.596878",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=6.110911",
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=4.596878s StreamFusion=6.110911s stock_trials=[4.596877902] sf_trials=[6.110910991]"
      ]
    },
    {
      "ticket": 317,
      "version": "candidate",
      "trial": 2,
      "exit_code": 0,
      "library_sha256": "e672251494db2eeb3dabe2fa226ebd207091b5b8c9fb7301cc422bad241f3d5f",
      "log": "streamfusion-317-fresh-candidate-memory-2.log",
      "measurements": [
        "[basic-type-trial] case=append-top1 engine=Flink trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=4.994326",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=0 warmup=true rows=2000000 keys=2000000 backend=memory seconds=6.159652",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.592017",
        "[basic-type-trial] case=append-top1 engine=Flink trial=1 warmup=true rows=2000000 keys=2000000 backend=memory seconds=5.840315",
        "[basic-type-trial] case=append-top1 engine=Flink trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=5.346429",
        "[basic-type-trial] case=append-top1 engine=StreamFusion trial=2 warmup=false rows=2000000 keys=2000000 backend=memory seconds=13.639240",
        "[basic-type] case=append-top1 rows=2000000 keys=2000000 native_expected=true backend=memory Flink=5.346429s StreamFusion=13.639240s stock_trials=[5.346429203] sf_trials=[13.639240112]"
      ]
    }
  ],
  "v6_native_correctness": {
    "passed": 679,
    "ignored": 2
  },
  "v6_candidate_source_sha256": {
    "native/engine/src/topn.rs": "aaf4e401e29034656b67e4cbb09480e18f7e7cfed6b48cbd0572c4d1c9c72078",
    "native/engine/src/topn/append_top1.rs": "aada9f4ddcfabc317eccb5a9412ee47a9baffa9aa92718792f01f1de70d4efc8",
    "native/engine/src/state/rocks_config.rs": "399ccdd9ea6feddb465b427de02662da47238a12eb4cecde0034eb75aefab330",
    "native/engine/src/state/rocks_store/mod.rs": "f1a9778be16e7e3c5dc3b840c41861edfa427f77f7d70ae3fb7ed8a8d2bc1b82",
    "native/engine/src/state/rocks_store/decoded_cache.rs": "5fb2dae46a76bc1e14043a278daa91402dd2636a9821a20b8d07d20fc3d60f0f",
    "src/main/java/tech/streamfusion/operator/NativeColumnarTopNOperator.java": "a267b207fec8377035fea62fa68e6c69b251fe083117b3fb41c5992863d349e7"
  },
  "v6_jvm_correctness": {
    "flink22": {
      "tests": 35,
      "failures": 0,
      "errors": 0,
      "skipped": 0,
      "log": "streamfusion-317-v6-final-jvm22.log"
    },
    "flink118": {
      "tests": 35,
      "failures": 0,
      "errors": 0,
      "skipped": 0,
      "log": "streamfusion-317-v6-final-jvm118.log"
    }
  },
  "maintainer_tradeoff": {
    "approved": "2026-10-13",
    "unique_memory_previous_improvement_percent": 9.08,
    "unique_memory_stock_slowdown_percent": 7.58,
    "follow_up": "https://github.com/datafusion-contrib/StreamFusion/issues/339"
  },
  "v6_native_criterion": {
    "fixtures_passed": 208,
    "log": "streamfusion-317-v6-final-criterion.log",
    "build": "release/mimalloc"
  }
}