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Pack float32 comparison results into bitmap words - #10741

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Pack float32 comparison results into bitmap words

9342120
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CodSpeed / CodSpeed Performance Analysis failed Oct 23, 2026 in 0s

1 benchmark 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.

Prevent compiler optimizations

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⚠️ 17 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.

Learn more about system calls

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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.

Learn more about Macro Runners

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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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⚡ 6 improved benchmarks
❌ 1 regressed benchmark
✅ 2401 untouched benchmarks
⏩ 12 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
❌ CPU Simulation test_scan_filter[int] 3 ms 3.5 ms -14.01%
⚡ Walltime compare_f32_avx2 4.4 µs 2.9 µs +50.36%
⚡ Walltime compare_f32_avx512 3.3 µs 2.4 µs +39.53%
⚡ Walltime compare_f32_neon 5.2 µs 4.2 µs +24.07%
⚡ CPU Simulation missing_stats[16] 85.8 µs 71.5 µs +20%
⚡ Walltime starts_with_avx2[64, VarBin] 62.7 µs 53.3 µs +17.5%
⚡ CPU Simulation chunked_canonicalize_into[(20, 100, 16, 4)] 371.9 µs 337.9 µs +10.08%

Tip

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


Comparing ct/row-fn-cleanup/f32-packing (9342120) with develop (d02df89)

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. ↩