After merging your PR, Conbench analyzed the 7 benchmarking runs that have been run so far on merge-commit 921863f.

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 2024-03-20 03:05:20Z
• Commit Run on test-mac-arm at 2024-03-20 03:18:34Z
• Commit Run on ursa-i9-9960x at 2024-03-20 02:29:21Z
• Commit Run on ursa-thinkcentre-m75q at 2024-03-20 03:11:26Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2024-03-20 02:26:45Z
• Commit Run on arm64-t4g-linux-compute at 2024-03-20 03:46:01Z
• Commit Run on arm64-m6g-linux-compute at 2024-03-20 03:39:38Z

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 ursa-thinkcentre-m75q at 2024-03-20 03:11:26Z

  • BM_WriteColumn (C++) with params=<false,Int64Type>, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark
  • BM_DictEncodingInt64_literals (C++) with params=1024, source=cpp-micro, suite=parquet-encoding-benchmark
  • BM_DictEncodingInt64_literals (C++) with params=65536, source=cpp-micro, suite=parquet-encoding-benchmark
  • ArrayArrayKernel (C++) with params=<Multiply, UInt64Type>/size:524288/inverse_null_proportion:100, source=cpp-micro, suite=arrow-compute-scalar-arithmetic-benchmark
  • BM_WriteColumn (C++) with params=<false,Int32Type>, source=cpp-micro, suite=parquet-arrow-reader-writer-benchmark

• Commit Run on arm64-m6g-linux-compute at 2024-03-20 03:39:38Z

  • BM_ReadInt64Column (C++) with params=<Repetition::OPTIONAL, Compression::LZ4, Encoding::BYTE_STREAM_SPLIT>/1024/1024, source=cpp-micro, suite=parquet-column-io-benchmark
  • BM_ReadInt64Column (C++) with params=<Repetition::OPTIONAL, Compression::ZSTD, Encoding::BYTE_STREAM_SPLIT>/1024/16, source=cpp-micro, suite=parquet-column-io-benchmark
  • BinaryBitOp (C++) with source=cpp-micro, suite=arrow-decimal-benchmark