After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit b3120c1.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on amd64-c6a-4xlarge-linux at 2026-03-31 16:08:24Z
• Commit Run on amd64-m5-4xlarge-linux at 2026-03-31 16:47:57Z
• Commit Run on arm64-t4g-2xlarge-linux at 2026-03-31 16:38:40Z

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 amd64-c6a-4xlarge-linux at 2026-03-31 16:08:24Z

  • ArrayArrayKernel (C++) with params=<MultiplyChecked, Int8Type>/size:524288/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark

• Commit Run on amd64-m5-4xlarge-linux at 2026-03-31 16:47:57Z

  • ParallelMemoryCopy (C++) with params=threads:8/real_time, source=cpp-micro, suite=arrow-io-memory-benchmark