After merging your PR, Conbench analyzed the 3 benchmarking runs that have been run so far on merge-commit f51a70f.

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 2026-04-05 10:03:44Z
• Commit Run on amd64-c6a-4xlarge-linux at 2026-04-05 09:23:33Z
• Commit Run on amd64-m5-4xlarge-linux at 2026-04-05 09:48:37Z

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 amd64-m5-4xlarge-linux at 2026-04-05 09:48:37Z
  • ParseJSONFields (C++) with params=ordered:0/schema:0/sparsity:10/num_fields:10, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:1/schema:0/sparsity:0/num_fields:100, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:0/schema:0/sparsity:0/num_fields:10, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:0/schema:0/sparsity:0/num_fields:100, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:1/schema:0/sparsity:10/num_fields:10, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:0/schema:0/sparsity:10/num_fields:100, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:1/schema:0/sparsity:10/num_fields:100, source=cpp-micro, suite=arrow-json-parser-benchmark
  • ParseJSONFields (C++) with params=ordered:1/schema:0/sparsity:0/num_fields:10, source=cpp-micro, suite=arrow-json-parser-benchmark