After merging your PR, Conbench analyzed the 5 benchmarking runs that have been run so far on merge-commit be3b789.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on test-mac-arm at 2024-04-03 10:46:38Z
• Commit Run on arm64-m6g-linux-compute at 2024-04-03 12:12:06Z
• Commit Run on arm64-t4g-linux-compute at 2024-04-03 10:38:33Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-04-03 09:26:11Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-04-03 13:48:25Z

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 2024-04-03 12:12:06Z

  • ExecuteScalarExpressionOverhead (C++) with params=ref_only_expression/rows_per_batch:1000/real_time/threads:16, source=cpp-micro, suite=arrow-acero-expression-benchmark

• Commit Run on arm64-t4g-linux-compute at 2024-04-03 10:38:33Z

  • ProjectionOverheadIsolated (C++) with params=simple_expression/batch_size:10000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark
  • ProjectionOverhead (C++) with params=complex_expression/batch_size:100000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark
  • MoveEmptyVector (C++) with params=<SMALL_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ProjectionOverheadIsolated (C++) with params=complex_expression/batch_size:100000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark
  • ProjectionOverheadIsolated (C++) with params=complex_expression/batch_size:10000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark
  • ProjectionOverheadIsolated (C++) with params=zero_copy_expression/batch_size:1000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark
  • ProjectionOverheadIsolated (C++) with params=simple_expression/batch_size:100000/real_time, source=cpp-micro, suite=arrow-acero-project-benchmark