After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit 3868ba9.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on arm64-t4g-2xlarge-linux at 2025-12-18 11:41:38Z
• Commit Run on amd64-c6a-4xlarge-linux at 2025-12-17 13:04:05Z
• Commit Run on amd64-m5-4xlarge-linux at 2025-12-17 23:30:04Z

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 2025-12-18 11:41:38Z
  • BM_ReadColumn (C++) with params=<false,BooleanType>/1/20, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark