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Merged
0ax1 merged 3 commits into from
Jan 27, 2026

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Merged

fix[gpu]: synchronous copy to host #6157

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CodSpeed HQ / CodSpeed Performance Analysis failed Jan 27, 2026

Performance Regression: -21.57%

⚠️ 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.

⚡ 11 improved benchmarks
❌ 7 regressed benchmarks
✅ 1247 untouched benchmarks
⏩ 1219 skipped benchmarks1

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
⚡ WallTime u8_FoR[10M] 7.3 µs 6.6 µs +11.78%
⚡ Simulation canonical_into_non_nullable[(10000, 1, 0.0)] 36.1 µs 24.8 µs +45.44%
⚡ Simulation canonical_into_non_nullable[(10000, 1, 0.01)] 41.1 µs 31.3 µs +31.33%
⚡ Simulation canonical_into_non_nullable[(10000, 10, 0.01)] 306.1 µs 221.3 µs +38.31%
⚡ Simulation canonical_into_non_nullable[(10000, 10, 0.1)] 471.6 µs 380.8 µs +23.85%
⚡ Simulation canonical_into_non_nullable[(10000, 1, 0.1)] 57.1 µs 47.1 µs +21.12%
⚡ Simulation canonical_into_non_nullable[(10000, 10, 0.0)] 278.8 µs 194.3 µs +43.5%
❌ Simulation canonical_into_nullable[(10000, 100, 0.0)] 4.3 ms 4.9 ms -12.42%
❌ Simulation into_canonical_non_nullable[(10000, 1, 0.0)] 32.2 µs 41.1 µs -21.57%
❌ Simulation into_canonical_non_nullable[(10000, 1, 0.1)] 54.6 µs 63.8 µs -14.54%
❌ Simulation into_canonical_non_nullable[(10000, 1, 0.01)] 38.4 µs 47.3 µs -18.75%
⚡ Simulation into_canonical_non_nullable[(10000, 10, 0.01)] 310.6 µs 229.3 µs +35.47%
⚡ Simulation into_canonical_non_nullable[(10000, 10, 0.0)] 283.2 µs 201.6 µs +40.49%
❌ Simulation into_canonical_nullable[(10000, 10, 0.0)] 456.5 µs 538.5 µs -15.23%
⚡ Simulation into_canonical_nullable[(10000, 10, 0.1)] 717.4 µs 629.3 µs +14.01%
❌ Simulation into_canonical_nullable[(10000, 100, 0.1)] 6.1 ms 6.9 ms -12.03%
⚡ Simulation into_canonical_non_nullable[(10000, 10, 0.1)] 472.8 µs 385.1 µs +22.78%
❌ Simulation into_canonical_nullable[(10000, 100, 0.0)] 4.3 ms 5.1 ms -14.47%

Comparing ad/fix-sync-copy (63ba235) with develop (78bec43)

Open in CodSpeed

Footnotes

  1. 1219 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