{
  "date": "2026-11-12",
  "baseRevision": "c3fc3786d779b1950007e94e05bcb3763b2cc14d",
  "changes": "Native Parquet row-group enumeration and split-aware decoder; uncommitted source hashes below",
  "build": {
    "command": "cargo build -p streamfusion-parquet --release --features mimalloc",
    "nativeLibrarySha256": "03bb6546da2e8907dfcb9eb26e04c1cb6d41d0c849d732b75a2f430c7c9cecdd",
    "rustVersion": "rustc 1.95.0 (59807616e 2026-04-14)",
    "flink": "2.2.1",
    "parquetJava": "1.15.2",
    "parquetRust": "58.4.1",
    "profile": "release, mimalloc"
  },
  "host": {
    "cpu": "Apple M4",
    "logicalCpus": 10,
    "memoryBytes": 17179869184,
    "cache": "warm local filesystem; shared developer host, CPU/storage load not isolated"
  },
  "method": {
    "boundary": "Source-only: file enumeration/footer discovery, task scheduling, host I/O, native decoding, JNI and C Data/Arrow import, checksum consumption and reader close. Excludes data generation and complete-query planning/shuffle/sink costs.",
    "resources": "Two fixed worker threads, 8 GiB Java heap, shared 512 MiB task off-heap authority, 8192-row native and stock batches.",
    "controls": "All modes read the identical single SNAPPY file and schema. Stock uses Flink BlockSplittingRecursiveEnumerator, which yields one local split. Native whole-file control uses NonSplittingRecursiveEnumerator with the same candidate native decoder, reproducing the preceding split policy rather than benchmarking an older binary.",
    "order": "Three warmups per mode and seven retained trials, rotating engine order each trial. No profilers.",
    "validation": "Every scan checks exact row count and id XOR key checksum; allocator and workspace return to zero after each trial. Separate SQL tests compare exact typed results and require positive source rows from both subtasks. Final cohorts run in the same JVM invocation as the targeted correctness tests; all timing trials remain sequential and unprofiled."
  },
  "sourceSha256": {
    "native/parquet/src/reader.rs": "f598535d817bdd5b61bdf7955a15b2a5c4eab75cd787923943bcaf583bee33bf",
    "src/main/java/tech/streamfusion/parquet/NativeParquet.java": "7b6033888ce9d14535f265e7ec569bbabfba4c169a6828de4fc14879e8db5b2a",
    "src/main/java/tech/streamfusion/parquet/NativeParquetBulkFormat.java": "868f6c38ac81ec07e9fbc0cabb345eb95197f6ba6d6c6df4138d7d19e83d03a9",
    "src/main/java/tech/streamfusion/parquet/NativeParquetSource.java": "cff7c9edea96e74f7792b797a4aaf4d2d10ed78a15231c79875b6479923f9c0f",
    "src/main/java/tech/streamfusion/parquet/ParquetInputFile.java": "4e819091b143c0282608e73784aa55c55b9270fd9de61da20c803a248f0fccf7",
    "src/main/java/tech/streamfusion/parquet/ParquetRowGroupEnumerator.java": "57223dc5a216eeb712ca817c728dfb624acd5ae0880b590d065a110801dea061",
    "src/test/java/tech/streamfusion/operator/ParquetSplitBenchmark.java": "e632d363b43b3c69a087b896e8457ca091f1486d5c22573615af37fc5ecf2979"
  },
  "validation": {
    "nativeReleaseTests": 27,
    "flink22Jdk17": {
      "tests": 19,
      "failures": 0,
      "errors": 0
    },
    "flink118Jdk11": {
      "tests": 19,
      "failures": 0,
      "errors": 0
    },
    "coverage": [
      "row-group ownership, including a boundary exactly at a physical midpoint",
      "one-file positive source rows from both subtasks",
      "nonzero split restore with a changed batch size and serialized split position",
      "restore of queued multiple splits and legacy whole-file positions",
      "split end and out-of-bounds checkpoint positions",
      "empty ranges, projected workspace accounting, cancellation and memory denial",
      "stock SQL equality, option/metadata fallback and producer retry",
      "INT96 wide dates, fractions, NULLs, dictionary encoding and selected row groups",
      "zero-row row groups between nonempty INT96 row groups"
    ],
    "sf1Tpch": {
      "mode": "verify",
      "scale": 1.0,
      "parallelism": 2,
      "nativeBytes": 536870912,
      "format": "parquet",
      "maxHeapBytes": 8589934592,
      "tables": {
        "customer": {
          "sha256": "a035a33a703d3a043ecf97746b4e3a7988316c1c04923fda63231a59d5e46092",
          "rows": 150000,
          "bytes": 24196144
        },
        "orders": {
          "sha256": "3f111871419ea6f319fcc51c235d199b3edf16754c5e100be92927527e5f6c97",
          "rows": 1500000,
          "bytes": 170452161
        },
        "lineitem": {
          "sha256": "4feb529dfa255799bbf0243d2f2c5028375dfb684e592eb94775345602aa2728",
          "rows": 6001215,
          "bytes": 753862072
        },
        "part": {
          "sha256": "cecd01146ae002aebe47e6b58bd81644df1d51d9c14da3425aea2b4976e02d60",
          "rows": 200000,
          "bytes": 23935125
        },
        "partsupp": {
          "sha256": "3a68b7b7757cd3aacccb39c4bc092dc3edf3b7e0e7609a259c39238cae0be41e",
          "rows": 800000,
          "bytes": 118184616
        },
        "supplier": {
          "sha256": "f5699b5df22724f41bee9b8521798d8fc0cecd5beb0bd3bca96547ac58095547",
          "rows": 10000,
          "bytes": 1399184
        },
        "nation": {
          "sha256": "7d47bc9397da331054fa92b8fb92e4c074004bad72dcbb893012093218dccf6c",
          "rows": 25,
          "bytes": 2199
        },
        "region": {
          "sha256": "5a7c2fe9718db00ff5e5bc82a9ebfa8abc492cc75260d3c0ffb411974f235ab0",
          "rows": 5,
          "bytes": 384
        }
      },
      "parquet": {
        "writer": "stock Flink filesystem/Parquet, SNAPPY, outside query timing",
        "writerParallelism": 2,
        "sourceCsvManifestSha256": "2087637bbeb54624bc11246101da422aa030cc719c093fdb8a3d35f0d2c704c7",
        "writerJobIds": [
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          "5504d103580dd34e6cb4c38b1467ee4b",
          "e8902149be4d6e5089834fed63b03dcb",
          "61b5a737d19d0c5b0ebcddd48a4e9caf",
          "b14f8a351a760c769d73fcc98d39bef0",
          "d11696ddc5dccaadff746d85279dc21f",
          "9dd9ad1013d4ac4133136240ea9a3fc6",
          "e667cce48b97f2800f4caa9d6e5e0f31"
        ],
        "files": [
          {
            "sha256": "1f8159e314958aacb385f466b732e3377552154b6e35d5ada2fa5d60f0a3418d",
            "path": "customer/part-e2c6907a-a2e1-404e-9a3a-bfbe72c92cf4-task-1-file-0",
            "bytes": 12443660
          },
          {
            "sha256": "c5632c71ca8166c772767664aebc5f469af816bfe65c12eb75f0d715f09f82b8",
            "path": "lineitem/part-030e9b72-16bf-4b68-9e34-594f27c54f32-task-1-file-0",
            "bytes": 228153614
          },
          {
            "sha256": "34e74d68051cbd1325868ab73f1007862759e35ea96369ffd9df3f51f0bbc454",
            "path": "nation/part-8303c7e6-8518-428f-9040-9ef28cfe705b-task-0-file-0",
            "bytes": 2793
          },
          {
            "sha256": "49def52deaac1e6567414196bffdf4f75f96bc6db850f312aad4a96bf930497d",
            "path": "orders/part-369402e9-2d03-4684-8487-1cb0a0831c8a-task-1-file-0",
            "bytes": 56372199
          },
          {
            "sha256": "97958d0273dbc8c2e2e4c50d87cf2b498e75ef992a9d5d47fbf519b34c666e21",
            "path": "part/part-1c0f6a06-6f81-4328-bb70-2b3ddd2b9a93-task-1-file-0",
            "bytes": 6232371
          },
          {
            "sha256": "632db8c0d92268a0f1cbfce783770e6b820436d8bf31e1c59fe5ca81900f2311",
            "path": "partsupp/part-9b8eb0ab-f969-44a7-a28b-6b060236c438-task-1-file-0",
            "bytes": 42491907
          },
          {
            "sha256": "1d8934d861eb59db767934a5767544398b2ca697d597efa01fde470723d239da",
            "path": "region/part-a5baacbd-3b12-4f93-9823-57761cf9538b-task-0-file-0",
            "bytes": 1300
          },
          {
            "sha256": "78ef70b358e12a8ec483ed36c6d5423ac7a83a3fe0c4bbcd1c09163a8832375a",
            "path": "supplier/part-9f1da342-0258-43a1-a570-1a5b6a2f93ba-task-1-file-0",
            "bytes": 797572
          }
        ]
      },
      "interpretation": "One verification pair per query, exact stock result/type equality and positive source work. These cold single observations are excluded from performance summaries.",
      "rowGroupsPerTable": {
        "customer": 1,
        "lineitem": 2,
        "nation": 1,
        "orders": 1,
        "part": 1,
        "partsupp": 1,
        "region": 1,
        "supplier": 1
      },
      "queries": [
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          "sqlSha256": "864a088f29bb394a6397b71c28a5bdb1dbd74e667f690917feff0d9e293df4e6",
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          "rows": 4,
          "resultSha256": "25510cc27944ade10f79659078255e62b67a443db84d89357894740eb0b9c28a",
          "stockNanos": [
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          "nativeNanos": [
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          "stockRuntimeMs": [
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          "nativeRuntimeMs": [
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          "status": "passed",
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          "nativeRuntimeMs": [
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          "status": "passed",
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