After merging your PR, Conbench analyzed the 6 benchmarking runs that have been run so far on merge-commit 2ab2c42.

Benchmarks with performance regressions

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

All benchmark runs analyzed:

• Commit Run on ursa-i9-9960x at 2023-12-06 17:20:21Z
• Commit Run on ec2-t3-xlarge-us-east-2 at 2023-12-06 01:55:00Z
• Commit Run on arm64-t4g-linux-compute at 2023-12-06 03:55:08Z
• Commit Run on ec2-m5-4xlarge-us-east-2 at 2023-12-06 03:26:40Z
• Commit Run on arm64-m6g-linux-compute at 2023-12-06 10:33:17Z
• Commit Run on ursa-thinkcentre-m75q at 2023-12-06 19:40:57Z

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-i9-9960x at 2023-12-06 17:20:21Z

  • Iterate vectors (JavaScript) with column=lng, dataset=tracks, length=1,000,000, source=js-micro, type=Float32
  • Iterate vectors (JavaScript) with column=lat, dataset=tracks, length=1,000,000, source=js-micro, type=Float32

• Commit Run on arm64-t4g-linux-compute at 2023-12-06 03:55:08Z

  • ReadUncachedFileAsync (C++) with params=num_cols:64/is_partial:0/real_time, source=cpp-micro, suite=arrow-ipc-read-write-benchmark

• Commit Run on ursa-thinkcentre-m75q at 2023-12-06 19:40:57Z

  • BitmapReaderSumWithOffset (C++) with params=32768, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BM_PlainDecodingByteArray (C++) with params=max-string-length:1024/batch-size:2048, source=cpp-micro, suite=parquet-encoding-benchmark
  • BitmapReaderSumWithOffset (C++) with params=65536, source=cpp-micro, suite=arrow-bit-block-counter-benchmark
  • BitmapReaderSumWithOffset (C++) with params=4096, source=cpp-micro, suite=arrow-bit-block-counter-benchmark