After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit b35883e.

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 2026-06-05 22:23:41Z
• Commit Run on test-mac-arm at 2026-06-05 22:19:27Z
• Commit Run on arm64-t4g-2xlarge-linux at 2026-06-05 23:14:25Z
• Commit Run on amd64-m5-4xlarge-linux at 2026-06-05 23:20:44Z

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 2026-06-05 22:23:41Z

  • BM_ReadBinaryViewColumnDeltaByteArray (C++) with params=null_probability:99/unique_values:-1, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark
  • BM_ReadBinaryViewColumn (C++) with params=null_probability:99/unique_values:-1, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark
  • BM_ReadBinaryViewColumn (C++) with params=null_probability:99/unique_values:32, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark

• Commit Run on test-mac-arm at 2026-06-05 22:19:27Z

  • BM_UnpackUint64 (C++) with params=DynamicUnaligned/20/256, source=cpp-micro, suite=arrow-bpacking-benchmark
  • BM_UnpackUint64 (C++) with params=DynamicUnaligned/47/64, source=cpp-micro, suite=arrow-bpacking-benchmark
  • BM_UnpackUint64 (C++) with params=DynamicUnaligned/20/128, source=cpp-micro, suite=arrow-bpacking-benchmark