After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit 0cd3c73.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on arm64-t4g-2xlarge-linux at 2025-10-21 11:43:22Z
• Commit Run on amd64-m5-4xlarge-linux at 2025-10-21 11:40:28Z
• Commit Run on test-mac-arm at 2025-10-21 15:32:12Z

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 arm64-t4g-2xlarge-linux at 2025-10-21 11:43:22Z
  • BM_UnpackUint16 (C++) with params=NeonUnaligned/8/1024, source=cpp-micro, suite=arrow-bpacking-benchmark
  • BM_UnpackUint16 (C++) with params=DynamicAligned/2/64, source=cpp-micro, suite=arrow-bpacking-benchmark
  • ReferenceDecompression (C++) with params=Compression::LZ4, source=cpp-micro, suite=arrow-compression-benchmark