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Convert trivial filters into slices during reduction, MaskValues::last uses BitBuffer::last_set_index - #9831

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robert3005 merged 1 commit into
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rk/trivialfilter
Oct 5, 2026
Merged

Convert trivial filters into slices during reduction, MaskValues::last uses BitBuffer::last_set_index#9831
robert3005 merged 1 commit into
developfrom
rk/trivialfilter

Convert trivial filters into slices during reduction, MaskValues::las…

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CodSpeed / CodSpeed Performance Analysis failed Sep 25, 2026

6 benchmarks 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.

⚠️ 3 benchmarks measured no execution time

Nothing ran under measurement, usually because the compiler removed the code under test. These results are not comparable, so they count as unchanged.

Preventing compiler optimizations

⚡ 22 improved benchmarks
❌ 6 regressed benchmarks
✅ 2152 untouched benchmarks
⏩ 385 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ Simulation filter_powerlaw_by_random[250000] 130.4 µs 168.2 µs -22.48%
❌ Simulation take_filter_primitive_nullable_slice_mask_random_indices[4096, 1000] 96.2 µs 121.7 µs -20.93%
❌ Simulation take_filter_primitive_nullable_slice_mask_random_indices[16384, 1000] 114.7 µs 144.1 µs -20.42%
❌ WallTime filtered_sink_i64_avx512[OneNullInEight] 22.6 µs 26.6 µs -15.3%
❌ Simulation take_filter_list_slice_mask_sequential_indices[768, 50] 128.9 µs 148.5 µs -13.19%
❌ Simulation take_filter_list_slice_mask_sequential_indices[256, 50] 130.1 µs 148.6 µs -12.4%
⚡ Simulation take_fsl_f16_force_manual_range_copy[2048, 10] 62.8 µs 9.9 µs ×6.4
⚡ Simulation density_sweep_dense_runs[0.9] 59.4 µs 15.3 µs ×3.9
⚡ Simulation density_sweep_single_slice[0.9999] 84.5 µs 23.2 µs ×3.6
⚡ Simulation density_sweep_single_slice[0.999] 84.2 µs 23.2 µs ×3.6
⚡ Simulation density_sweep_single_slice[0.95] 82.3 µs 23.2 µs ×3.5
⚡ Simulation density_sweep_single_slice[0.99] 82 µs 23.2 µs ×3.5
⚡ Simulation density_sweep_single_slice[0.5] 64 µs 23.3 µs ×2.8
⚡ Simulation density_sweep_single_slice[0.9] 48.1 µs 23.3 µs ×2.1
⚡ Simulation density_sweep_single_slice[0.1] 48 µs 23.3 µs ×2.1
⚡ Simulation density_sweep_single_slice[0.05] 46.3 µs 23.3 µs +98.88%
⚡ Simulation density_sweep_single_slice[0.01] 40.8 µs 23.2 µs +75.78%
⚡ Simulation density_sweep_random[0.02] 89 µs 63.4 µs +40.41%
⚡ Simulation density_sweep_single_slice[0.005] 32.2 µs 23.2 µs +39.16%
⚡ Simulation patterns_i128[Contiguous] 29.3 µs 22.1 µs +32.86%
... ... ... ... ... ...

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Comparing rk/trivialfilter (a556e0c) with develop (38fa7e3)

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Footnotes

  1. 385 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. ↩

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