After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit ba5ca20.

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 2026-08-21 13:55:54Z
• Commit Run on arm64-t4g-2xlarge-linux at 2026-08-21 14:33:01Z
• Commit Run on amd64-m5-4xlarge-linux at 2026-08-21 14:30:24Z

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 2026-08-21 14:33:01Z
  • ArrayRangeEqualsString (C++) with params=65536/0, source=cpp-micro, suite=arrow-compare-benchmark