After merging your PR, Conbench analyzed the 5 benchmarking runs that have been run so far on merge-commit 517d849.

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-t3-xlarge-us-east-2 at 2023-09-26 22:01:29Z
• Commit Run on arm64-t4g-linux-compute at 2023-09-26 23:35:09Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-09-26 23:02:33Z
• Commit Run on arm64-m6g-linux-compute at 2023-09-27 01:11:49Z
• Commit Run on ursa-thinkcentre-m75q at 2023-09-27 05:58:37Z

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-m6g-linux-compute at 2023-09-27 01:11:49Z
  • ReadMmapUncachedFileAsync (C++) with params=num_cols:64/is_partial:1/real_time, source=cpp-micro, suite=arrow-ipc-read-write-benchmark