After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit 5acf67c.

Benchmarks with performance regressions

There were 22 possible performance regressions, according to the lookback z-score method.

Benchmarks with regressions:

• Commit Run on ursa-i9-9960x at 2024-01-09 23:17:32Z
  • file-read (R) with compression=uncompressed, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=dataframe
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-20, scale_factor=1
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-16, scale_factor=1
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-17, scale_factor=1
  • 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
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-15, scale_factor=1
  • file-read (R) with compression=lz4, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=dataframe
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-20, scale_factor=1
  • file-read (R) with compression=lz4, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=dataframe
  • dataframe-to-table (R) with dataset=type_dict, language=R
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-18, scale_factor=1
  • file-read (R) with compression=uncompressed, dataset=fanniemae_2016Q4, file_type=feather, language=R, output_type=table
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-17, scale_factor=10
  • file-read (R) with compression=uncompressed, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=table
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-16, scale_factor=1
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-17, scale_factor=1
  • file-read (R) with compression=snappy, dataset=nyctaxi_2010-01, file_type=parquet, language=R, output_type=table
  • tpch (R) with engine=arrow, format=native, language=R, memory_map=False, query_id=TPCH-15, scale_factor=1
  • file-read (R) with compression=uncompressed, dataset=nyctaxi_2010-01, file_type=feather, language=R, output_type=dataframe
  • dataframe-to-table (R) with dataset=type_floats, language=R
  • tpch (R) with engine=arrow, format=parquet, language=R, memory_map=False, query_id=TPCH-20, scale_factor=10

All benchmark runs analyzed:

• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-01-09 17:09:17Z
• Commit Run on arm64-t4g-linux-compute at 2024-01-09 18:26:04Z
• Commit Run on ursa-i9-9960x at 2024-01-09 23:17:32Z
• Commit Run on arm64-m6g-linux-compute at 2024-01-10 10:23:29Z
• Commit Run on ursa-thinkcentre-m75q at 2024-01-10 14:03:20Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-01-09 15:59:46Z

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 2024-01-10 14:03:20Z
  • Constants (C++) with source=cpp-micro, suite=arrow-decimal-benchmark