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Avoid row index canonicalization for trivial masks - #9717

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Avoid row index canonicalization for trivial masks#9717
danking wants to merge 1 commit into
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dk/row-idx-mask-sequence-fast-path

Avoid row index canonicalization for trivial masks

130193d
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CodSpeed HQ / CodSpeed Performance Analysis failed Sep 1, 2026 in 0s

Performance Regression: -4.73%

⚠️ 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.

⚡ 2 improved benchmarks
❌ 3 regressed benchmarks
✅ 2085 untouched benchmarks
⏩ 206 skipped benchmarks1
🗄️ 4 archived benchmarks run2

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
WallTime arrow_checked_add_u32_neon[16384] 13.4 µs 20.3 µs -34.28%
Simulation cached_indices_i128[0.01] 48.1 µs 61.7 µs -22.04%
Simulation compress_fsst[(500, 64, 8)] 482.1 µs 536.2 µs -10.09%
Simulation cached_indices_i32[0.01] 51.6 µs 37.5 µs +37.4%
WallTime words_gather_scalar_avx512[1024] 124 ns 100 ns +24%

Tip

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


Comparing dk/row-idx-mask-sequence-fast-path (130193d) with develop (e7512cf)3

Open in CodSpeed

Footnotes

  1. 206 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. 4 benchmarks were run, but are now archived. If they were deleted in another branch, consider rebasing to remove them from the report. Instead if they were added back, click here to restore them.

  3. No successful run was found on develop (e3923a5) during the generation of this report, so e7512cf was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.