After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit 20bbe3e.

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 2023-07-25 09:18:27Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-07-25 09:55:14Z
• Commit Run on arm64-m6g-linux-compute at 2023-07-25 10:23:58Z
• Commit Run on arm64-t4g-linux-compute at 2023-07-25 10:17:19Z
• Commit Run on ursa-thinkcentre-m75q at 2023-07-26 10:27:24Z
• Commit Run on ursa-i9-9960x at 2023-07-31 09:45:42Z

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 2023-07-25 10:17:19Z
  • params=complex_expression/batch_size:100000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark
  • params=complex_expression/batch_size:10000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark