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perf(cuda): copy cached file pages directly on the GPU - #10716

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0ax1 merged 1 commit into
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ad/cuda-mapped-copy
Oct 23, 2026
Merged

0ax1 merged 1 commit into
developfrom
ad/cuda-mapped-copy

perf(cuda): copy cached file pages directly on the GPU

5d8b5f3
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CodSpeed / CodSpeed Performance Analysis failed Oct 23, 2026 in 28m 49s

1 benchmark regressed

3 warnings, 1 note

⚠️ 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

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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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⚠️ 16 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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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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⚡ 2 improved benchmarks
❌ 1 regressed benchmark
✅ 2405 untouched benchmarks
⏩ 12 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 starts_with_avx512[8, VarBin] 40 µs 45.3 µs -11.8%
⚡ CPU Simulation decode_primitives[i64, (1000, 8)] 37.6 µs 24 µs +56.62%
⚡ Walltime words_gather_dispatch_neon[65536] 2 µs 1.8 µs +10.67%

Tip

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


Comparing ad/cuda-mapped-copy (5d8b5f3) with develop (e083440)

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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. 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. ↩