After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit d7a5777.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on test-mac-arm at 2024-04-25 00:18:09Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-04-25 00:33:16Z
• Commit Run on arm64-t4g-linux-compute at 2024-04-25 00:34:55Z
• Commit Run on ursa-thinkcentre-m75q at 2024-04-25 00:08:45Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2024-04-25 00:19:15Z
• Commit Run on arm64-m6g-linux-compute at 2024-04-24 23:26:59Z

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 2024-04-25 00:18:09Z

  • ArrayRankStringNarrow (C++) with params=65536/10000/tiebreaker:3, source=cpp-micro, suite=arrow-compute-vector-sort-benchmark
  • ArrayRankStringNarrow (C++) with params=65536/100/tiebreaker:3, source=cpp-micro, suite=arrow-compute-vector-sort-benchmark

• Commit Run on arm64-t4g-linux-compute at 2024-04-25 00:34:55Z

  • IsInInt16SmallSet (C++) with params=64, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmark
  • ChunkCSVStocksExample (C++) with source=cpp-micro, suite=arrow-csv-parser-benchmark
  • IsInInt8SmallSet (C++) with params=2, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmark
  • ChunkCSVQuotedBlock (C++) with source=cpp-micro, suite=arrow-csv-parser-benchmark
  • ShortVectorPushBack (C++) with params=<STD_VECTOR(std::string)>, source=cpp-micro, suite=arrow-small-vector-benchmark
  • IsInInt8SmallSet (C++) with params=4, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmark
  • IsInInt64SmallSet (C++) with params=16, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmark
  • IsInInt8SmallSet (C++) with params=8, source=cpp-micro, suite=arrow-compute-scalar-set-lookup-benchmark
  • ChunkCSVFlightsExample (C++) with source=cpp-micro, suite=arrow-csv-parser-benchmark

• Commit Run on ursa-thinkcentre-m75q at 2024-04-25 00:08:45Z

  • BM_DeltaBitPackingEncode_Int64_Fixed (C++) with params=32768, source=cpp-micro, suite=parquet-encoding-benchmark
  • BatchToTensorSimple (C++) with params=/size:32768/num_columns:3, source=cpp-micro, suite=arrow-tensor-benchmark
  • BM_WriteColumn (C++) with params=<false,BooleanType>, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark