After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 6b59098.

Benchmarks with performance regressions

There was 1 possible performance regression, according to the lookback z-score method.

Benchmarks with regressions:

• Commit Run on amd64-m5-4xlarge-linux at 2024-10-01 16:24:48Z
  • partitioned-dataset-filter (R) with dataset=dataset-taxi-parquet, language=R, query=vignette

All benchmark runs analyzed:

• Commit Run on test-mac-arm at 2024-10-01 20:24:19Z
• Commit Run on arm64-t4g-2xlarge-linux at 2024-10-01 16:33:27Z
• Commit Run on amd64-c6a-4xlarge-linux at 2024-10-01 16:14:13Z
• Commit Run on amd64-m5-4xlarge-linux at 2024-10-01 16:24:48Z

Unstable benchmarks with performance regressions

The following benchmark results indicate a possible performance regression, but are known to sometimes produce false positives when applying the lookback z-score analysis.

• Commit Run on test-mac-arm at 2024-10-01 20:24:19Z

  • BM_ByteStreamSplitEncode_Double_Neon (C++) with params=4096, source=cpp-micro, suite=parquet-encoding-benchmark
  • ExportType (C++) with source=cpp-micro, suite=arrow-bridge-benchmark
  • UniqueUInt8 (C++) with params=6, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • UniqueUInt8 (C++) with params=5, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • ArrayScalarKernel (C++) with params=<AddChecked, Int16Type>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark

• Commit Run on amd64-c6a-4xlarge-linux at 2024-10-01 16:14:13Z

  • ShortVectorInsertAtEnd (C++) with params=<STD_VECTOR(int)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • CopyShortVector (C++) with params=<STD_VECTOR(int)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ShortVectorPushBack (C++) with params=<STD_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ConstructFromShortStdVector (C++) with params=<STD_VECTOR(int)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • CopyShortVector (C++) with params=<STD_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark