After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit 11ef68d.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-02-20 22:44:57Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-02-20 21:44:58Z
• Commit Run on arm64-t4g-linux-compute at 2024-02-20 23:15:01Z

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-linux-compute at 2024-02-20 23:15:01Z
  • BitmapReader (C++) with params=8192, source=cpp-micro, suite=arrow-bit-util-benchmark