After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 4ed5a14.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on amd64-c6a-4xlarge-linux at 2024-09-03 02:29:05Z
• Commit Run on arm64-t4g-2xlarge-linux at 2024-09-03 05:49:12Z
• Commit Run on amd64-m5-4xlarge-linux at 2024-09-03 06:26:40Z
• Commit Run on test-mac-arm at 2024-09-03 16:37:44Z

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 amd64-c6a-4xlarge-linux at 2024-09-03 02:29:05Z

  • HexParsing (C++) with params=, source=cpp-micro, suite=arrow-value-parsing-benchmark
  • TouchArea (C++) with params=size:16777216/real_time/threads:8, source=cpp-micro, suite=arrow-memory-pool-benchmark
  • BenchmarkTemporalRounding (C++) with params=<CeilTemporal, zoned, round_1_minute>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MinutesBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MillisecondsBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • RoundDerivativesArrayBenchmark (C++) with params=<Trunc, FloatType>/size:524288/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MicrosecondsBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<DaysBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • ExecuteScalarExpressionBaseline (C++) with params=/rows_per_batch:10000/real_time/threads:1, source=cpp-micro, suite=arrow-acero-expression-benchmark
  • BitmapEqualsWithOffset (C++) with params=8192, source=cpp-micro, suite=arrow-bit-util-benchmark
  • BenchmarkTemporalRounding (C++) with params=<CeilTemporal, zoned, round_10_minute>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<WeeksBetween, zoned>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalRounding (C++) with params=<CeilTemporal, zoned, round_10_minute>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • ExecuteScalarExpressionBaseline (C++) with params=/rows_per_batch:1000/real_time/threads:1, source=cpp-micro, suite=arrow-acero-expression-benchmark
  • BM_DictDecodingInt64_repeats (C++) with params=4096, source=cpp-micro, suite=parquet-encoding-benchmark
  • BenchmarkTemporalRounding (C++) with params=<CeilTemporal, zoned, round_1_minute>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • RoundDerivativesArrayBenchmark (C++) with params=<Trunc, FloatType>/size:524288/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark
  • ReadRecordBatch (C++) with params=8192/real_time, source=cpp-micro, suite=arrow-ipc-read-write-benchmark
  • BenchmarkTemporalBinary (C++) with params=<HoursBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark

• Commit Run on amd64-m5-4xlarge-linux at 2024-09-03 06:26:40Z

  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/1/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/4/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/0/9, 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
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/6/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/7/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark
  • FilterFixedSizeBinaryFilterWithNulls (C++) with params=1048576/2/9, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark

• Commit Run on test-mac-arm at 2024-09-03 16:37:44Z

  • Int8RowMajorMatrixConversionFixture (C++) with params=/ConvertToSparseCSRMatrixInt16, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • BM_DeltaBitPackingDecode_Int32_Wide (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark
  • Int8StridedMatrixConversionFixture (C++) with params=/ConvertToSparseCSRMatrixInt8, source=cpp-micro, suite=arrow-tensor-conversion-benchmark