After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 56e3836.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on amd64-c6a-4xlarge-linux at 2025-10-24 03:39:48Z
• Commit Run on arm64-t4g-2xlarge-linux at 2025-10-24 05:18:26Z
• Commit Run on amd64-m5-4xlarge-linux at 2025-10-24 05:04:03Z
• Commit Run on test-mac-arm at 2025-10-24 04:02:48Z

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 amd64-c6a-4xlarge-linux at 2025-10-24 03:39:48Z

  • GreaterArrayScalarString (C++) with params=32768/2, source=cpp-micro, suite=arrow-compute-scalar-compare-benchmark
  • GreaterArrayScalarString (C++) with params=32768/100, source=cpp-micro, suite=arrow-compute-scalar-compare-benchmark
  • BM_UnpackUint64 (C++) with params=Avx2Unaligned/8/1024, source=cpp-micro, suite=arrow-bpacking-benchmark
  • GreaterArrayScalarString (C++) with params=32768/1, source=cpp-micro, suite=arrow-compute-scalar-compare-benchmark
  • GreaterArrayScalarString (C++) with params=32768/10000, source=cpp-micro, suite=arrow-compute-scalar-compare-benchmark
  • BM_UnpackUint16 (C++) with params=DynamicAligned/13/1024, source=cpp-micro, suite=arrow-bpacking-benchmark
  • BM_UnpackUint64 (C++) with params=Avx2Unaligned/2/64, source=cpp-micro, suite=arrow-bpacking-benchmark
  • GreaterArrayScalarString (C++) with params=32768/0, source=cpp-micro, suite=arrow-compute-scalar-compare-benchmark
  • GreaterArrayScalarString (C++) with params=32768/10, source=cpp-micro, suite=arrow-compute-scalar-compare-benchmark
  • BM_UnpackUint16 (C++) with params=DynamicUnaligned/13/1024, source=cpp-micro, suite=arrow-bpacking-benchmark

• Commit Run on arm64-t4g-2xlarge-linux at 2025-10-24 05:18:26Z

  • BM_UnpackUint16 (C++) with params=NeonUnaligned/1/32768, source=cpp-micro, suite=arrow-bpacking-benchmark