After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit 59f30f0.

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 2023-08-11 19:41:31Z
  • csv-read (Python) with compression=uncompressed, dataset=nyctaxi_2010-01, output_format=arrow_table, streaming=file

All benchmark runs analyzed:

• Commit Run on ursa-thinkcentre-m75q at 2023-08-09 18:52:53Z
• Commit Run on ursa-i9-9960x at 2023-08-11 19:41:31Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-08-08 18:26:34Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-08-08 18:31:59Z
• Commit Run on arm64-t4g-linux-compute at 2023-08-08 19:28:06Z
• Commit Run on arm64-m6g-linux-compute at 2023-08-09 06:52:31Z

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 ursa-thinkcentre-m75q at 2023-08-09 18:52:53Z

  • ArrayArrayKernel (C++) with params=<Divide, DoubleType>/size:524288/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • LruCacheLookup (C++) with params=8/1024, source=cpp-micro, suite=arrow-cache-benchmark
  • UniqueInt64 (C++) with params=6, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • UniqueInt64 (C++) with params=13, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • BenchmarkTemporalBinary (C++) with params=<MonthDayNanoBetween, date64_type>/524288/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark

• Commit Run on arm64-t4g-linux-compute at 2023-08-08 19:28:06Z

  • HashIntegers (C++) with source=cpp-micro, suite=arrow-hashing-benchmark

• Commit Run on arm64-m6g-linux-compute at 2023-08-09 06:52:31Z

  • ErrorSchemeStatus (C++) with source=cpp-micro, suite=arrow-type-benchmark