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

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

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

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CodSpeed HQ / CodSpeed Performance Analysis failed Sep 11, 2026 in 0s

15 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.

⚠️ 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

⚡ 21 improved benchmarks
❌ 15 regressed benchmarks
✅ 2161 untouched benchmarks
⏩ 218 skipped benchmarks1

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] 12.3 µs 20.4 µs -39.88%
❌ Simulation random_i8[0.5] 67.8 µs 93.1 µs -27.14%
❌ Simulation take_filter_primitive_nullable_slice_mask_random_indices[4096, 1000] 99.9 µs 130.9 µs -23.68%
❌ Simulation take_filter_primitive_nullable_slice_mask_random_indices[16384, 1000] 118.4 µs 151.1 µs -21.6%
❌ Simulation filter_list_primitive_short[Sparse] 132.6 µs 168.3 µs -21.18%
❌ Simulation filter_list_primitive_wide[Sparse] 133.5 µs 168.9 µs -20.94%
❌ Simulation filter_list_primitive_short[Clustered] 134.2 µs 168.4 µs -20.3%
❌ Simulation filter_list_primitive_short[Prefix] 137.8 µs 169.6 µs -18.74%
❌ Simulation filter_list_primitive_wide[Clustered] 137.9 µs 169.2 µs -18.52%
❌ Simulation filter_list_primitive_wide[Prefix] 138.2 µs 169 µs -18.22%
❌ Simulation filter_powerlaw_by_random[10000] 32.3 µs 37.9 µs -14.83%
❌ Simulation take_filter_primitive_slice_mask_sequential_indices[16384, 1000] 52.8 µs 61 µs -13.48%
❌ WallTime dict_canonicalize_gt_u8_neon[1000000] 486.9 µs 560 µs -13.05%
❌ WallTime words_gather_scalar_avx2[65536] 8.2 µs 9.4 µs -12.24%
❌ WallTime dict_canonicalize_gt_u8_neon[16000000] 8.4 ms 9.3 ms -10.07%
⚡ Simulation density_sweep_single_slice[0.9999] 84.2 µs 27.3 µs ×3.1
⚡ Simulation density_sweep_single_slice[0.999] 84 µs 27.3 µs ×3.1
⚡ Simulation density_sweep_single_slice[0.99] 83.7 µs 27.3 µs ×3.1
⚡ Simulation density_sweep_single_slice[0.95] 82.2 µs 27.3 µs ×3
⚡ Simulation density_sweep_single_slice[0.9] 80.4 µs 27.3 µs ×2.9
... ... ... ... ... ...

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

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Comparing rk/trivialfilter (d997574) with develop (8e2aa05)

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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