After merging your PR, Conbench analyzed the 5 benchmarking runs that have been run so far on merge-commit 3793560.

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-m6g-linux-compute at 2023-10-23 13:05:24Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-10-23 12:25:30Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-10-23 12:19:35Z
• Commit Run on arm64-t4g-linux-compute at 2023-10-23 13:11:13Z
• Commit Run on ursa-thinkcentre-m75q at 2023-10-23 17:50:08Z

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 2023-10-23 13:05:24Z

  • ExecuteScalarExpressionOverhead (C++) with params=complex_integer_expression/rows_per_batch:100000/real_time/threads:16, source=cpp-micro, suite=arrow-acero-expression-benchmark
  • RoundArrayBenchmark (C++) with params=<Round, DoubleType, RoundMode::DOWN>/size:1048576/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark

• Commit Run on ursa-thinkcentre-m75q at 2023-10-23 17:50:08Z

  • CopyShortVector (C++) with params=<SMALL_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • BM_ByteStreamSplitDecode_Double_Scalar (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • ConstructFromEmptyStdVector (C++) with params=<STATIC_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark