Slots are a Box<[...]> instead of Vec<...> #7822
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CodSpeed HQ / CodSpeed Performance Analysis
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May 7, 2026 in 0s
Performance Regression: -20.78%
⚠️ 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.
⚡ 7 improved benchmarks
❌ 9 regressed benchmarks
✅ 1190 untouched benchmarks
⚠️ Please fix the performance issues or acknowledge them on CodSpeed.
Performance Changes
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ⚡ | Simulation | filter_all_true[100000] |
8.8 µs | 7.7 µs | +15.02% |
| ⚡ | Simulation | filter_all_true[250000] |
8.8 µs | 7.7 µs | +14.59% |
| ❌ | Simulation | new_bp_prim_test_between[i32, 32768] |
140.2 µs | 169.7 µs | -17.39% |
| ⚡ | Simulation | patched_take_10k_adversarial |
259.1 µs | 229 µs | +13.14% |
| ❌ | Simulation | new_bp_prim_test_between[i16, 32768] |
120.3 µs | 135.3 µs | -11.08% |
| ❌ | Simulation | new_bp_prim_test_between[i32, 16384] |
93.8 µs | 109.4 µs | -14.26% |
| ❌ | Simulation | new_bp_prim_test_between[i64, 16384] |
114.4 µs | 144.4 µs | -20.78% |
| ⚡ | Simulation | patched_take_10k_dispersed |
316 µs | 285.9 µs | +10.53% |
| ❌ | Simulation | patched_take_10k_contiguous_patches |
258.9 µs | 287.8 µs | -10.03% |
| ⚡ | Simulation | patched_take_10k_first_chunk_only |
302.5 µs | 272.5 µs | +11.03% |
| ⚡ | Simulation | take_10k_first_chunk_only |
271.2 µs | 226.7 µs | +19.62% |
| ⚡ | Simulation | take_10k_dispersed |
284.4 µs | 240.4 µs | +18.34% |
| ❌ | Simulation | decompress_rd[f64, (100000, 0.01)] |
843.3 µs | 1,021.7 µs | -17.46% |
| ❌ | Simulation | decompress_rd[f32, (100000, 0.1)] |
495.9 µs | 583.8 µs | -15.06% |
| ❌ | Simulation | decompress_rd[f64, (100000, 0.1)] |
843.3 µs | 1,021.7 µs | -17.46% |
| ❌ | Simulation | decompress_rd[f32, (100000, 0.01)] |
495.9 µs | 583.8 µs | -15.06% |
Comparing rk/smallvec (99b4a4a) with develop (eda8c2c)
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