After merging your PR, Conbench analyzed the 5 benchmarking runs that have been run so far on merge-commit 9f0101e.

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 2024-03-30 01:41:15Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-03-30 02:15:01Z
• Commit Run on arm64-t4g-linux-compute at 2024-03-30 04:09:03Z
• Commit Run on arm64-m6g-linux-compute at 2024-03-30 04:08:48Z
• Commit Run on test-mac-arm at 2024-04-01 18:54:47Z

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 2024-03-30 04:08:48Z
  • ExecuteScalarExpressionOverhead (C++) with params=ref_only_expression/rows_per_batch:1000/real_time/threads:16, source=cpp-micro, suite=arrow-acero-expression-benchmark