After merging your PR, Conbench analyzed the 4 benchmarking runs that have been run so far on merge-commit 0affccc.

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 2024-04-12 05:42:24Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-04-12 07:07:45Z
• Commit Run on arm64-t4g-linux-compute at 2024-04-12 06:51:16Z
• Commit Run on arm64-m6g-linux-compute at 2024-04-12 09:15:19Z

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-linux-compute at 2024-04-12 06:51:16Z
  • ReadLevels_Rle (C++) with params=MaxLevel:1/NumLevels:8096/BatchSize:1024/LevelRepeatCount:1024, source=cpp-micro, suite=parquet-column-reader-benchmark
  • CopyShortVector (C++) with params=<SMALL_VECTOR(int)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ShortVectorInsert (C++) with params=<SMALL_VECTOR(int)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • ConstructFromEmptyStdVector (C++) with params=<STD_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • MoveEmptyVector (C++) with params=<STATIC_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark