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perf: specialize primitive sums for run-end arrays - #9823

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ct/sum-runend
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perf: specialize primitive sums for run-end arrays#9823
connortsui20 wants to merge 5 commits into
developfrom
ct/sum-runend

perf: scan all-valid run-end sums directly

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CodSpeed HQ / CodSpeed Performance Analysis failed Sep 9, 2026 in 0s

Performance Regression: -11.87%

⚠️ 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

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

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ WallTime dict_canonicalize_gt_u8_avx512[16000000] 6.8 ms 11.3 ms -39.91%
❌ WallTime arrow_checked_add_u32_neon[16384] 12.2 µs 20.3 µs -39.87%
⚡ WallTime dict_canonicalize_gt_u8_neon[1000000] 559.8 µs 487.3 µs +14.89%
⚡ Simulation allocate_drop_arrow[0] 456.9 ns 402.7 ns +13.45%
⚡ WallTime dict_canonicalize_gt_u8_neon[16000000] 9.4 ms 8.3 ms +12.92%
🆕 Simulation grouped_runend_fallback[1, 1024] N/A 738.5 µs N/A
🆕 Simulation grouped_runend_fallback[1, 4] N/A 830.8 µs N/A
🆕 Simulation grouped_runend_fallback[1, 64] N/A 763.8 µs N/A
🆕 Simulation grouped_runend_fallback[128, 1024] N/A 149.8 µs N/A
🆕 Simulation grouped_runend_fallback[128, 4] N/A 217.6 µs N/A
🆕 Simulation grouped_runend_fallback[128, 64] N/A 147.3 µs N/A
🆕 Simulation grouped_runend_fallback[2, 1024] N/A 443.9 µs N/A
🆕 Simulation grouped_runend_fallback[2, 4] N/A 518.4 µs N/A
🆕 Simulation grouped_runend_fallback[2, 64] N/A 454.6 µs N/A
🆕 Simulation grouped_runend_fallback[8, 1024] N/A 220.6 µs N/A
🆕 Simulation grouped_runend_fallback[8, 4] N/A 287.9 µs N/A
🆕 Simulation grouped_runend_fallback[8, 64] N/A 222.2 µs N/A
🆕 Simulation grouped_runend[1, 1024] N/A 455.4 µs N/A
🆕 Simulation grouped_runend[1, 4] N/A 482.3 µs N/A
🆕 Simulation grouped_runend[1, 64] N/A 461.4 µs N/A
... ... ... ... ... ...

ℹ️ Only the first 20 benchmarks are displayed. Go to the app to view all benchmarks.

Tip

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

Comparing ct/sum-runend (31e3f62) with develop (e3b8eb2)

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. ↩

View more details on CodSpeed HQ