After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit f5e40dc.

Benchmarks with performance regressions

There were 6 possible performance regressions, according to the lookback z-score method.

Benchmarks with regressions:

• Commit Run on ursa-i9-9960x at 2023-10-06 08:03:49Z
  • dataset-selectivity (Python) with dataset=nyctaxi_multi_ipc_s3, selectivity=10%
  • dataset-selectivity (Python) with dataset=nyctaxi_multi_parquet_s3, selectivity=100%
  • dataset-selectivity (Python) with dataset=nyctaxi_multi_ipc_s3, selectivity=100%
  • dataset-selectivity (Python) with dataset=nyctaxi_multi_parquet_s3, selectivity=10%
  • dataframe-to-table (R) with dataset=type_floats, language=R
  • dataset-selectivity (Python) with dataset=nyctaxi_multi_ipc_s3, selectivity=1%

All benchmark runs analyzed:

• Commit Run on arm64-m6g-linux-compute at 2023-10-06 06:45:34Z
• Commit Run on ursa-i9-9960x at 2023-10-06 08:03:49Z
• Commit Run on ursa-thinkcentre-m75q at 2023-10-06 14:54:03Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-10-05 20:12:21Z
• Commit Run on arm64-t4g-linux-compute at 2023-10-05 23:02:42Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-10-05 22:20:02Z

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 2023-10-06 14:54:03Z

  • WriteCsvNumericCheckQuote (C++) with params=1, source=cpp-micro, suite=arrow-csv-writer-benchmark
  • WriteCsvNumericCheckQuote (C++) with params=0, source=cpp-micro, suite=arrow-csv-writer-benchmark
  • WriteCsvNumeric (C++) with params=1, source=cpp-micro, suite=arrow-csv-writer-benchmark
  • FilterRecordBatchWithNulls (C++) with params=100/13, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • WriteCsvNumeric (C++) with params=0, source=cpp-micro, suite=arrow-csv-writer-benchmark

• Commit Run on arm64-t4g-linux-compute at 2023-10-05 23:02:42Z

  • ReadUncachedFile (C++) with params=num_cols:64/is_partial:1/real_time, source=cpp-micro, suite=arrow-ipc-read-write-benchmark