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Dispatch filter take of fixed-width values on byte width - #10736

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rk/size-take-fixed-width-bytes

Dispatch filter take of fixed-width values on byte width

c989232
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CodSpeed / CodSpeed Performance Analysis failed Oct 23, 2026 in 28m 38s

2 benchmarks regressed

4 warnings, 1 note

⚠️ Walltime results may be unreliable

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

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⚠️ Unable to measure the execution of 1 benchmark

This benchmark measured no execution time, so its result is not comparable and counts as unchanged. This usually happens when the compiler removes the code under test.

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⚠️ 20 benchmarks are 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.

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⚠️ 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.

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ℹ️ 40 benchmarks have no flamegraph

The flamegraph wasn't generated: the symbols of the profiling trace could not be resolved, because no information about the language frames was collected.

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⚡ 15 improved benchmarks
❌ 2 regressed benchmarks
✅ 2391 untouched benchmarks
⏩ 12 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ Walltime starts_with_avx512[8, VarBin] 39.6 µs 45.4 µs -12.86%
❌ Walltime threshold_avx512[80] 2.4 µs 2.7 µs -10.61%
⚡ CPU Simulation test_scan_filter_to_arrow_array[int_float] 4.1 ms 3.5 ms +15.88%
⚡ CPU Simulation filter_powerlaw_by_mostly_false[250000] 158.2 µs 136.8 µs +15.68%
⚡ CPU Simulation density_sweep_dense_runs[0.001] 61.3 µs 53.4 µs +14.82%
⚡ CPU Simulation filter_random_by_mostly_false[250000] 183.9 µs 162.4 µs +13.23%
⚡ CPU Simulation test_repeated_scan_filter[int_float] 3.9 ms 3.4 ms +12.28%
⚡ CPU Simulation filter_random_by_power_law[250000] 185.3 µs 165.4 µs +12.03%
⚡ CPU Simulation filter_powerlaw_by_power_law[250000] 185.3 µs 165.6 µs +11.87%
⚡ CPU Simulation random_i128[0.01] 5.8 µs 5.2 µs +11.82%
⚡ CPU Simulation test_repeated_scan_filter[int] 2.7 ms 2.5 ms +11.01%
⚡ CPU Simulation test_scan_filter_to_arrow_array[int] 2.8 ms 2.5 ms +10.94%
⚡ CPU Simulation filter_random_by_mostly_false[100000] 88.4 µs 79.9 µs +10.62%
⚡ CPU Simulation density_sweep_random[0.1] 88.3 µs 79.9 µs +10.51%
⚡ CPU Simulation density_sweep_dense_runs[0.9] 65.7 µs 59.5 µs +10.34%
⚡ CPU Simulation filter_powerlaw_by_mostly_false[100000] 88.2 µs 79.9 µs +10.31%
⚡ CPU Simulation filter_random_by_random[250000] 201.1 µs 182.8 µs +10.01%

Tip

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


Comparing rk/size-take-fixed-width-bytes (c989232) with develop (8c680f2)2

Open in CodSpeed

Footnotes

  1. 12 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. No successful run was found on develop (c88edde) during the generation of this report, so 8c680f2 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩