After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit e83c23b.

Benchmarks with performance regressions

There was 1 possible performance regression, according to the lookback z-score method.

Benchmarks with regressions:

• Commit Run on ursa-i9-9960x at 2023-09-21 15:41:12Z
  • dataframe-to-table (R) with dataset=type_floats, language=R

All benchmark runs analyzed:

• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-09-21 15:59:35Z
• Commit Run on ursa-i9-9960x at 2023-09-21 15:41:12Z
• Commit Run on arm64-t4g-linux-compute at 2023-09-21 16:44:26Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-09-21 16:14:25Z
• Commit Run on arm64-m6g-linux-compute at 2023-09-21 16:39:20Z
• Commit Run on ursa-thinkcentre-m75q at 2023-09-21 22:24:30Z

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 2023-09-21 16:39:20Z
  • MoveEmptyVector (C++) with params=<SMALL_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • HexParsing (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark