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Address recurring CodSpeed warnings - #10839

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connortsui20 merged 3 commits into
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ct/trusting-goodall-2kfoac
Oct 27, 2026
Merged

connortsui20 merged 3 commits into
developfrom
ct/trusting-goodall-2kfoac

Keep system calls out of simulated CodSpeed iterations

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CodSpeed / CodSpeed Performance Analysis failed Oct 27, 2026

7 benchmarks regressed

3 warnings

⚠️ Walltime results may be unreliable

Some benchmarks used the Walltime instrument outside CodSpeed Macro Runners, which can make the results inconsistent.

Learn more about Macro Runners

See affected benchmarks

⚠️ 1 benchmark is dominated by system calls

System calls cannot be simulated consistently and are left out of the measure. The reported value understates the real cost. Switch to the Walltime instrument to measure them.

Learn more about system calls

See affected benchmarks

⚠️ Base and head ran on different runner types

Some benchmarks with significant performance changes were compared across different runner types, so the changes might not come from the code. Run base and head on the same runner type, or use CodSpeed Macro Runners for more stable results.

Learn more about Macro Runners

Open the report in CodSpeed to investigate

⚡ 14 improved benchmarks
❌ 7 regressed benchmarks
✅ 2408 untouched benchmarks
⏩ 126 skipped benchmarks1
🗄️ 43 archived benchmarks run2

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ Walltime threshold_neon[8] 1.4 µs 2.6 µs -45.99%
❌ Walltime filter_neon[8] 922 ns 1,516 ns -39.18%
❌ Walltime threshold_neon[64] 2.6 µs 4.2 µs -37.52%
❌ Walltime filter_neon[64] 1.8 µs 2.7 µs -34.65%
❌ CPU Simulation chunked_dict_primitive_canonical_into[f64, (1000, 1000, 10)] 141 µs 203.9 µs -30.82%
❌ Walltime threshold_neon[80] 3.5 µs 4.7 µs -26.06%
❌ Walltime filter_neon[80] 2.5 µs 3.3 µs -23.69%
⚡ CPU Simulation filter_run_end[len=4096_run=16_density=0.1] 153.9 µs 53.4 µs ×2.9
⚡ CPU Simulation density_sweep_random[0.001] 46.9 µs 19.3 µs ×2.4
⚡ CPU Simulation filter_powerlaw_by_correlated_runs[10000] 29.4 µs 13.9 µs ×2.1
⚡ CPU Simulation test_repeated_scan_scalar_at[int_float] 365.1 µs 307.8 µs +18.65%
⚡ CPU Simulation test_repeated_scan_scalar_at[int_str] 396.6 µs 335.2 µs +18.34%
⚡ CPU Simulation test_repeated_scan_scalar_at[int_str_float] 477.8 µs 410 µs +16.52%
⚡ CPU Simulation filter_powerlaw_by_power_law[250000] 182.9 µs 158.1 µs +15.67%
⚡ Walltime mul_u16_nonnull_avx512 12.5 µs 10.9 µs +15.42%
⚡ Walltime filter_avx2[80] 2 µs 1.7 µs +14.38%
⚡ CPU Simulation like_per_row_patterns 191.5 µs 168.1 µs +13.94%
⚡ Walltime subtract_shapes_avx512[(32768, PerRowPerRow)] 13.1 µs 11.6 µs +13.03%
⚡ CPU Simulation test_repeated_scan_filter[int] 2.7 ms 2.4 ms +12.29%
⚡ CPU Simulation test_repeated_scan_scalar_at[int] 235.4 µs 211.4 µs +11.32%
... ... ... ... ... ...

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/trusting-goodall-2kfoac (83d7d47) with develop (fb4a037)

Open in CodSpeed

Footnotes

  1. 126 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. 43 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. ↩