After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit aab17c3.

Benchmarks with performance regressions

There were 0 possible performance regressions, according to the lookback z-score method.

All benchmark runs analyzed:

• Commit Run on arm64-t4g-2xlarge-linux at 2024-09-13 15:00:15Z
• Commit Run on amd64-c6a-4xlarge-linux at 2024-09-13 14:43:40Z
• Commit Run on test-mac-arm at 2024-09-13 16:18:16Z
• Commit Run on amd64-m5-4xlarge-linux at 2024-09-13 14:55:22Z

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 arm64-t4g-2xlarge-linux at 2024-09-13 15:00:15Z

  • MoveShortVector (C++) with params=<SMALL_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • Int8RowMajorTensorConversionFixture (C++) with params=/ConvertToSparseCOOTensorInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • MemoizeLruCached (C++) with params=8/16, source=cpp-micro, suite=arrow-cache-benchmark
  • DoubleColumnMajorTensorConversionFixture (C++) with params=/ConvertToSparseCSFTensorInt32, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • SelectKInt64 (C++) with params=65536/100, source=cpp-micro, suite=arrow-compute-vector-topk-benchmark
  • MatchLikeSubstring (C++) with source=cpp-micro, suite=arrow-compute-scalar-string-benchmark
  • FloatColumnMajorTensorConversionFixture (C++) with params=/ConvertToSparseCOOTensorInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • DoubleColumnMajorTensorConversionFixture (C++) with params=/ConvertToSparseCSFTensorInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • FloatColumnMajorTensorConversionFixture (C++) with params=/ConvertToSparseCOOTensorInt32, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • FloatColumnMajorTensorConversionFixture (C++) with params=/ConvertToSparseCSFTensorInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • DoubleRowMajorMatrixConversionFixture (C++) with params=/ConvertToSparseCSCMatrixInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • GrouperWithMultiTypes (C++) with params="{int64}"/1024/0, source=cpp-micro, suite=arrow-compute-grouper-benchmark
  • ShortVectorPushBack (C++) with params=<STATIC_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • FloatRowMajorTensorConversionFixture (C++) with params=/ConvertToSparseCSFTensorInt64, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • CopyShortVector (C++) with params=<SMALL_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ShortVectorPushBack (C++) with params=<STATIC_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • TakeInt64RandomIndicesWithNulls (C++) with params=1048576/1, source=cpp-micro, suite=arrow-compute-vector-selection-benchmark

• Commit Run on amd64-c6a-4xlarge-linux at 2024-09-13 14:43:40Z

  • CheckIndexBoundsInt32 (C++) with params=524288/1, source=cpp-micro, suite=arrow-int-util-benchmark
  • CheckIndexBoundsUInt32 (C++) with params=524288/1, source=cpp-micro, suite=arrow-int-util-benchmark
  • memory_latency (C++) with params=262144/repeats:1, source=cpp-micro, suite=arrow-machine-benchmark
  • BitmapUInt64Reader (C++) with params=8192, source=cpp-micro, suite=arrow-bit-util-benchmark

• Commit Run on test-mac-arm at 2024-09-13 16:18:16Z

  • BenchmarkTemporal (C++) with params=<Subsecond, non_zoned>/4194304/0, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • memory_latency (C++) with params=2048/repeats:1, source=cpp-micro, suite=arrow-machine-benchmark
  • BM_PlainEncodingFloat (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark
  • TouchArea (C++) with params=size:1048576/real_time/threads:2, source=cpp-micro, suite=arrow-memory-pool-benchmark
  • BenchmarkTemporalRounding (C++) with params=<RoundTemporal, non_zoned, round_1_month>/4194304/100, source=cpp-micro, suite=arrow-compute-scalar-temporal-benchmark
  • BM_ReadOffsetIndex (C++) with params=num_pages:1024, source=cpp-micro, suite=parquet-page-index-benchmark

• Commit Run on amd64-m5-4xlarge-linux at 2024-09-13 14:55:22Z

  • ArrayRangeEqualsSparseUnion (C++) with params=32768/100, source=cpp-micro, suite=arrow-compare-benchmark
  • ArrayRangeEqualsSparseUnion (C++) with params=32768/10000, source=cpp-micro, suite=arrow-compare-benchmark
  • DoubleStridedMatrixConversionFixture (C++) with params=/ConvertToSparseCSRMatrixInt32, source=cpp-micro, suite=arrow-tensor-conversion-benchmark
  • ShortVectorPushBack (C++) with params=<STATIC_VECTOR(std::shared_ptr)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ToString (C++) with source=cpp-micro, suite=arrow-decimal-benchmark