After merging your PR, Conbench analyzed the 7 benchmarking runs that have been run so far on merge-commit 1a1d2c8.

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 2024-04-05 03:34:48Z
  • dataset-selectivity (Python) with dataset=nyctaxi_multi_ipc_s3, selectivity=100%

All benchmark runs analyzed:

• Commit Run on test-mac-arm at 2024-04-05 03:46:27Z
• Commit Run on ursa-i9-9960x at 2024-04-05 03:34:48Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-04-05 03:35:55Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-04-05 02:52:50Z
• Commit Run on arm64-t4g-linux-compute at 2024-04-05 04:17:59Z
• Commit Run on arm64-m6g-linux-compute at 2024-04-05 04:12:08Z
• Commit Run on ursa-thinkcentre-m75q at 2024-04-05 08:33:49Z

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 test-mac-arm at 2024-04-05 03:46:27Z

  • DoubleColumnMajorTensorConversionFixture (C++) with params=/ConvertToSparseCOOTensorInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark

• Commit Run on arm64-t4g-linux-compute at 2024-04-05 04:17:59Z

  • BM_DecodeArrowBooleanRle (C++) with params=DecodeArrowWithNull/num_values:4096/null_in_ten_thousand:10000, source=cpp-micro, suite=parquet-encoding-benchmark

• Commit Run on ursa-thinkcentre-m75q at 2024-04-05 08:33:49Z

  • ValidateSmallAscii (C++) with source=cpp-micro, suite=arrow-utf8-util-benchmark
  • BM_WriteColumn (C++) with params=<false,Int64Type>, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark
  • BM_DeltaBitPackingEncode_Int32_Wide (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark