After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 3f514f2.

Benchmarks with performance regressions

There were 0 possible performance regressions, according to the lookback z-score method.

All benchmark runs analyzed:

• Commit Run on test-mac-arm at 2024-09-18 05:18:48Z
• Commit Run on arm64-t4g-2xlarge-linux at 2024-09-18 02:17:29Z
• Commit Run on amd64-c6a-4xlarge-linux at 2024-09-18 02:00:57Z
• Commit Run on amd64-m5-4xlarge-linux at 2024-09-18 02:13:14Z

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 2024-09-18 05:18:48Z

  • ConstructFromEmptyStdVector (C++) with params=<SMALL_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • CopyShortVector (C++) with params=<SMALL_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ConstructFromEmptyStdVector (C++) with params=<SMALL_VECTOR(int)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • CopyShortVector (C++) with params=<SMALL_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • CheckIndexBoundsUInt32 (C++) with params=65536/1000, source=cpp-micro, suite=arrow-int-util-benchmark

• Commit Run on amd64-m5-4xlarge-linux at 2024-09-18 02:13:14Z

  • ListSliceInt64ListViewWithStepAndStop (C++) with params=32768/10, source=cpp-micro, suite=arrow-compute-scalar-list-benchmark
  • ListSliceInt64ListViewWithStop (C++) with params=32768/0, source=cpp-micro, suite=arrow-compute-scalar-list-benchmark
  • FieldPathGetFromWideTable (C++) with params=100, source=cpp-micro, suite=arrow-type-benchmark