After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit a8a604c.

Benchmarks with performance regressions

There were 8 possible performance regressions, according to the lookback z-score method.

Benchmarks with regressions:

• Commit Run on ursa-i9-9960x at 2023-09-08 04:23:16Z
  • file-read (R) with compression=uncompressed, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=dataframe
  • file-read (R) with compression=lz4, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=table
  • file-read (R) with compression=lz4, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=table
  • file-read (R) with compression=uncompressed, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=dataframe
  • file-read (R) with compression=lz4, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=dataframe
  • file-read (R) with compression=lz4, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=dataframe
  • file-read (R) with compression=uncompressed, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=table
  • file-read (R) with compression=uncompressed, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=table

All benchmark runs analyzed:

• Commit Run on ursa-i9-9960x at 2023-09-08 04:23:16Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-09-08 04:44:42Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-09-08 04:31:53Z
• Commit Run on arm64-t4g-linux-compute at 2023-09-08 05:32:40Z
• Commit Run on arm64-m6g-linux-compute at 2023-09-08 09:22:13Z
• Commit Run on ursa-thinkcentre-m75q at 2023-09-09 11:19:05Z

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 ursa-thinkcentre-m75q at 2023-09-09 11:19:05Z
  • ErrorSchemeStatusNoInline (C++) with source=cpp-micro, suite=arrow-type-benchmark
  • BenchmarkTemporalRounding (C++) with params=<RoundTemporal, non_zoned, round_1_month>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalRounding (C++) with params=<RoundTemporal, non_zoned, round_10_month>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalRounding (C++) with params=<RoundTemporal, non_zoned, round_10_month>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark