After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 2de8008.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on test-mac-arm at 2024-07-05 22:27:40Z
• Commit Run on ec2-c6a-4xlarge-us-east-2 at 2024-07-05 22:24:51Z
• Commit Run on arm64-t4g-linux-compute at 2024-07-05 22:43:34Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-07-05 22:35:55Z

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 2024-07-05 22:27:40Z

  • RoundArrayBenchmark (C++) with params=<Round, UInt32Type, RoundMode::HALF_TO_ODD>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark
  • RoundArrayBenchmark (C++) with params=<Round, Int32Type, RoundMode::HALF_TO_ODD>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark
  • RoundArrayBenchmark (C++) with params=<Round, Int32Type, RoundMode::DOWN>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark

• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-07-05 22:35:55Z

  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/7/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_PlainEncodingBoolean (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_PlainEncodingBoolean (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_PlainEncodingBoolean (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_RleEncodingSpacedBoolean (C++) with params=32768/5000, 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_ComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_DictEncodingInt64_repeats (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/2/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/3/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_RleEncodingSpacedBoolean (C++) with params=32768/1000, source=cpp-micro, suite=parquet-encoding-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/5/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_DictEncodingInt64_repeats (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/1/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_PlainEncodingBoolean (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DictDecodingInt64_repeats (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/6/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_DictEncodingInt64_repeats (C++) with params=4096, source=cpp-micro, suite=parquet-encoding-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/4/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_DictEncodingInt64_repeats (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DictDecodingInt64_repeats (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_BatchComputeHash (C++) with params=, source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • BM_InsertHash (C++) with source=cpp-micro, suite=parquet-bloom-filter-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/0/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • BM_DictEncodingInt64_literals (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark