After merging your PR, Conbench analyzed the 7 benchmarking runs that have been run so far on merge-commit d83af8f.

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-t3-xlarge-us-east-2 at 2024-05-08 13:18:50Z
• Commit Run on test-mac-arm at 2024-05-08 12:11:02Z
• Commit Run on ursa-i9-9960x at 2024-05-08 11:09:31Z
• Commit Run on ursa-thinkcentre-m75q at 2024-05-08 12:00:14Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-05-08 11:43:31Z
• Commit Run on arm64-t4g-linux-compute at 2024-05-08 13:31:53Z
• Commit Run on arm64-m6g-linux-compute at 2024-05-08 11:16:58Z

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 2024-05-08 12:11:02Z

  • SchemaEquals (C++) with source=cpp-micro, suite=arrow-type-benchmark
  • RoundDerivativesArrayBenchmark (C++) with params=<Ceil, DoubleType>/size:4194304/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-round-benchmark
  • BitmapReaderSum (C++) with params=32768, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BitBlockCounterSumWithOffset (C++) with params=32768, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BitBlockCounterFourWordsSum (C++) with params=2, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BitBlockCounterSumWithOffset (C++) with params=4096, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BitBlockCounterFourWordsSum (C++) with params=8, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BitBlockCounterSumWithOffset (C++) with params=65536, source=cpp-micro, suite=arrow-bit-block-counter-benchmark

• Commit Run on ursa-thinkcentre-m75q at 2024-05-08 12:00:14Z

  • UniqueString10bytes (C++) with params=6, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • CheckIndexBoundsUInt32 (C++) with params=524288/1, source=cpp-micro, suite=arrow-int-util-benchmark
  • BM_RleDecoding (C++) with params=65536/16, source=cpp-micro, suite=parquet-column-io-benchmark
  • ArrayRangeEqualsStruct (C++) with params=32768/0, source=cpp-micro, suite=arrow-compare-benchmark
  • SetBitsTo (C++) with params=1024, source=cpp-micro, suite=arrow-bit-util-benchmark
  • UniqueString100bytes (C++) with params=6, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • CheckIndexBoundsInt32 (C++) with params=524288/1, source=cpp-micro, suite=arrow-int-util-benchmark
  • UniqueString10bytes (C++) with params=13, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • BM_RleDecoding (C++) with params=1024/16, source=cpp-micro, suite=parquet-column-io-benchmark
  • CheckIndexBoundsUInt32 (C++) with params=32768/1, source=cpp-micro, suite=arrow-int-util-benchmark
  • UniqueString100bytes (C++) with params=13, source=cpp-micro, suite=arrow-compute-vector-hash-benchmark
  • ArrayRangeEqualsString (C++) with params=32768/0, source=cpp-micro, suite=arrow-compare-benchmark
  • BM_RleDecoding (C++) with params=4096/16, source=cpp-micro, suite=parquet-column-io-benchmark
  • CheckIndexBoundsInt32 (C++) with params=32768/1, source=cpp-micro, suite=arrow-int-util-benchmark
  • BM_RleDecoding (C++) with params=32768/16, source=cpp-micro, suite=parquet-column-io-benchmark

• Commit Run on arm64-t4g-linux-compute at 2024-05-08 13:31:53Z

  • BatchToTensorSimple (C++) with params=/size:1048576/num_columns:3, source=cpp-micro, suite=arrow-tensor-benchmark