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feat: specialize primitive sums for constant and run-end arrays - #9821

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feat: specialize primitive sums for constant and run-end arrays#9821
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ct/constant-runend-sum

feat: specialize primitive sums for constant and run-end arrays

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CodSpeed HQ / CodSpeed Performance Analysis failed Sep 9, 2026

2 benchmarks regressed

⚠️ Unknown Walltime execution environment detected

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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

⚡ 3 improved benchmarks
❌ 2 regressed benchmarks
✅ 2188 untouched benchmarks
🆕 38 new benchmarks
⏩ 218 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ Simulation random_i16[0.8] 75.5 µs 93.9 µs -19.65%
❌ WallTime mul_u32_nonnull_avx512 5.5 µs 6.3 µs -11.32%
⚡ Simulation random_i8[0.5] 91.4 µs 68.1 µs +34.17%
⚡ WallTime dict_canonicalize_gt_u8_neon[1000000] 567.1 µs 486.8 µs +16.5%
⚡ WallTime dict_canonicalize_gt_u8_neon[16000000] 9.3 ms 8 ms +15.7%
🆕 Simulation grouped_constant_fallback[1] N/A 161.6 ms N/A
🆕 Simulation grouped_constant_fallback[128] N/A 1.4 ms N/A
🆕 Simulation grouped_constant_fallback[2] N/A 81 ms N/A
🆕 Simulation grouped_constant_fallback[8] N/A 20.3 ms N/A
🆕 Simulation grouped_constant[1] N/A 13 ms N/A
🆕 Simulation grouped_constant[128] N/A 211.8 µs N/A
🆕 Simulation grouped_constant[2] N/A 6.5 ms N/A
🆕 Simulation grouped_constant[8] N/A 1.7 ms N/A
🆕 Simulation grouped_runend_fallback[1, 1024] N/A 5.2 ms N/A
🆕 Simulation grouped_runend_fallback[1, 4] N/A 5.8 ms N/A
🆕 Simulation grouped_runend_fallback[1, 64] N/A 5.2 ms N/A
🆕 Simulation grouped_runend_fallback[128, 1024] N/A 282.5 µs N/A
🆕 Simulation grouped_runend_fallback[128, 4] N/A 853.8 µs N/A
🆕 Simulation grouped_runend_fallback[128, 64] N/A 288.8 µs N/A
🆕 Simulation grouped_runend_fallback[2, 1024] N/A 2.7 ms N/A
... ... ... ... ... ...

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Comparing ct/constant-runend-sum (ae99ee8) with develop (e3b8eb2)

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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. ↩

View more details on CodSpeed HQ