After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 9b58454.

Benchmarks with performance regressions

There were 0 possible performance regressions, according to the lookback z-score method.

All benchmark runs analyzed:

• Commit Run on ec2-c6a-4xlarge-us-east-2 at 2024-08-07 13:23:01Z
• Commit Run on test-mac-arm at 2024-08-07 13:28:44Z
• Commit Run on arm64-t4g-linux-compute at 2024-08-07 13:42:35Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-08-07 13:36:30Z

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 ec2-c6a-4xlarge-us-east-2 at 2024-08-07 13:23:01Z

  • IntegerFormatting (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • IntegerFormatting (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • IntegerFormatting (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • BM_BatchComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_RleDecoding (C++) with params=4096/1, source=cpp-micro, suite=parquet-column-io-benchmark
  • BM_PlainEncodingSpacedBoolean (C++) with params=32768/10000, source=cpp-micro, suite=parquet-encoding-benchmark
  • IntegerFormatting (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • BM_RleEncodingSpacedBoolean (C++) with params=32768/10000, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • IntegerFormatting (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • IntegerFormatting (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • BM_PlainEncodingSpacedDouble (C++) with params=32768/10000, source=cpp-micro, suite=parquet-encoding-benchmark

• Commit Run on arm64-t4g-linux-compute at 2024-08-07 13:42:35Z

  • BenchmarkTemporalRounding (C++) with params=<CeilTemporal, non_zoned, round_1_minute>/1048576/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<YearsBetween, date64_type>/1048576/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MonthsBetween, date64_type>/1048576/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark

• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-08-07 13:36:30Z

  • BM_RleEncodingSpacedBoolean (C++) with params=32768/1, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DeltaBitPackingEncode_Int64_Fixed (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DeltaBitPackingEncode_Int64_Fixed (C++) with params=4096, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_DeltaBitPackingEncode_Int64_Narrow (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DeltaBitPackingEncode_Int64_Narrow (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_BatchComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_BatchComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_DeltaBitPackingEncode_Int64_Fixed (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_PlainEncodingSpacedBoolean (C++) with params=32768/10000, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DeltaBitPackingEncode_Int64_Narrow (C++) with params=4096, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DeltaBitPackingEncode_Int64_Fixed (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_RleDecoding (C++) with params=4096/1, source=cpp-micro, suite=parquet-column-io-benchmark