After merging your PR, Conbench analyzed the 8 benchmarking runs that have been run so far on merge-commit 9d93287.

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-m5-4xlarge-us-east-2 at 2024-06-19 01:01:12Z
• Commit Run on arm64-m6g-linux-compute at 2024-06-19 03:42:27Z
• Commit Run on ec2-c6a-4xlarge-us-east-2 at 2024-06-19 01:28:03Z
• Commit Run on ursa-thinkcentre-m75q at 2024-06-19 04:03:08Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-06-19 03:55:58Z
• Commit Run on ec2-r5-4xlarge-us-east-2 at 2024-06-19 00:47:25Z
• Commit Run on arm64-t4g-linux-compute at 2024-06-19 04:30:56Z
• Commit Run on test-mac-arm at 2024-06-19 05:38:03Z

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 ec2-c6a-4xlarge-us-east-2 at 2024-06-19 01:28:03Z

  • GenerateBitsUnrolled (C++) with params=8192, source=cpp-micro, suite=arrow-bit-util-benchmark
  • ArrayArrayKernel (C++) with params=<AddChecked, Int32Type>/size:524288/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark

• Commit Run on ursa-thinkcentre-m75q at 2024-06-19 04:03:08Z

  • CompressedInputStreamNonZeroCopyBufferProvidedByCaller (C++) with params=Compression::LZ4_FRAME/num_bytes:1048576/batch_size:1048576, source=cpp-micro, suite=arrow-io-compressed-benchmark
  • ListSliceStringListToFSL (C++) with params=32768/1, source=cpp-micro, suite=arrow-compute-scalar-list-benchmark
  • CompressedInputStreamZeroCopyBufferProvidedByCaller (C++) with params=Compression::LZ4_FRAME/num_bytes:1048576/batch_size:1048576, source=cpp-micro, suite=arrow-io-compressed-benchmark