After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 756c864.

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 2024-10-10 03:45:58Z
• Commit Run on amd64-m5-4xlarge-linux at 2024-10-10 03:58:57Z
• Commit Run on arm64-t4g-2xlarge-linux at 2024-10-10 04:03:49Z
• Commit Run on test-mac-arm at 2024-10-10 06:22:58Z

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 amd64-c6a-4xlarge-linux at 2024-10-10 03:45:58Z

  • TouchArea (C++) with params=size:65536/real_time/threads:8, source=cpp-micro, suite=arrow-memory-pool-benchmark

• Commit Run on amd64-m5-4xlarge-linux at 2024-10-10 03:58:57Z

  • ValidateTinyNonAscii (C++) with source=cpp-micro, suite=arrow-utf8-util-benchmark
  • AllocateTouchDeallocate (C++) with params=/size:1048576/real_time/threads:8, source=cpp-micro, suite=arrow-memory-pool-benchmark
  • ExecuteScalarExpressionOverhead (C++) with params=ref_only_expression/rows_per_batch:1000000/real_time/threads:1, source=cpp-micro, suite=arrow-acero-expression-benchmark

• Commit Run on test-mac-arm at 2024-10-10 06:22:58Z

  • ArrayArrayKernel (C++) with params=<MultiplyChecked, UInt8Type>/size:4194304/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • BitRunReaderLinear (C++) with params=50, source=cpp-micro, suite=arrow-bit-util-benchmark
  • ArrayArrayKernel (C++) with params=<DivideChecked, UInt8Type>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • BenchmarkTemporal (C++) with params=<Minute, non_zoned>/4194304/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BM_ArrowBinaryPlain (C++) with params=EncodeArrow/262144, source=cpp-micro, suite=parquet-encoding-benchmark
  • ArrayScalarKernel (C++) with params=<DivideChecked, UInt16Type>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • ArrayArrayKernel (C++) with params=<MultiplyChecked, UInt16Type>/size:4194304/inverse_null_proportion:0, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • ArrayArrayKernel (C++) with params=<DivideChecked, UInt16Type>/size:4194304/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • BenchmarkTemporal (C++) with params=<Hour, non_zoned>/4194304/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BenchmarkTemporal (C++) with params=<Hour, non_zoned>/4194304/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark