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Compress wide decimals into lower parts when the writer permits the v2 format - #9759

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Compress wide decimals into lower parts when the writer permits the v…

78415c2
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CodSpeed / CodSpeed Performance Analysis failed Sep 18, 2026

1 benchmark regressed

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 6 improved benchmarks
❌ 1 regressed benchmark
✅ 2246 untouched benchmarks
⏩ 218 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation decompress[u64, (4000, 1024)] 71.7 µs 87.6 µs -18.14%
WallTime arrow_checked_add_u32_neon[16384] 20.3 µs 12.9 µs +57.95%
Simulation take_filter_list_slice_mask_sequential_indices[768, 50] 184 µs 141.8 µs +29.78%
Simulation take_filter_list_slice_mask_sequential_indices[256, 50] 185.4 µs 143.3 µs +29.32%
Simulation compact[(1024, 90)] 1.4 µs 1.3 µs +12.98%
Simulation compact[(2048, 90)] 1.5 µs 1.3 µs +12.4%
Simulation allocate_drop_arrow[0] 516.4 ns 462.3 ns +11.72%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.


Comparing mk/dbp-v2 (78415c2) with mk/edition-aware-schemes (97cbf22)2

Open in CodSpeed

Footnotes

  1. 218 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

  2. No successful run was found on mk/edition-aware-schemes (d3526b5) during the generation of this report, so 7a50318 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.