After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 1c1f7f3.

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 2024-09-18 14:01:48Z
• Commit Run on amd64-c6a-4xlarge-linux at 2024-09-18 10:03:13Z
• Commit Run on arm64-t4g-2xlarge-linux at 2024-09-18 10:21:11Z
• Commit Run on amd64-m5-4xlarge-linux at 2024-09-18 10:11:51Z

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 2024-09-18 14:01:48Z

  • BM_PlainDecodingSpacedByteArray (C++) with params=max-string-length:1024/batch-size:512, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_PlainEncodingBoolean (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark

• Commit Run on amd64-c6a-4xlarge-linux at 2024-09-18 10:03:13Z

  • BenchmarkTemporalBinary (C++) with params=<WeeksBetween, zoned>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MicrosecondsBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<HoursBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MonthDayNanoBetween, zoned>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • ShortVectorInsertAtEnd (C++) with params=<SMALL_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MinutesBetween, 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
  • BenchmarkTemporalBinary (C++) with params=<MillisecondsBetween, zoned>/524288/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark

• Commit Run on arm64-t4g-2xlarge-linux at 2024-09-18 10:21:11Z

  • BitBlockCounterBench (C++) with params=1032192, source=cpp-micro, suite=arrow-bitmap-reader-benchmark