Use smallvec for internal stats storage #7823
Merged
CodSpeed HQ / CodSpeed Performance Analysis
failed
May 7, 2026
Performance Regression: -23.06%
⚠️ 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.
⚡ 6 improved benchmarks
❌ 5 regressed benchmarks
✅ 1195 untouched benchmarks
⚠️ Please fix the performance issues or acknowledge them on CodSpeed.
Performance Changes
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ⚡ | Simulation | chunked_constant_i32_append_to_builder[(1000, 10)] |
40.6 µs | 30.1 µs | +34.78% |
| ⚡ | Simulation | chunked_bool_canonical_into[(1000, 10)] |
57.2 µs | 50.3 µs | +13.74% |
| ⚡ | Simulation | varbinview_large |
436.3 µs | 174.5 µs | ×2.5 |
| ❌ | Simulation | patched_take_10k_contiguous_patches |
228.6 µs | 288.2 µs | -20.66% |
| ❌ | Simulation | take_10k_contiguous |
270.9 µs | 329.1 µs | -17.69% |
| ❌ | Simulation | patched_take_10k_random |
241 µs | 300.1 µs | -19.7% |
| ❌ | Simulation | take_10k_random |
194.9 µs | 253.4 µs | -23.06% |
| ⚡ | Simulation | null_count_run_end[(10000, 1024, 0.01)] |
4 µs | 3.2 µs | +24.46% |
| ⚡ | Simulation | null_count_run_end[(10000, 256, 0.01)] |
4 µs | 3.2 µs | +25.61% |
| ⚡ | Simulation | null_count_run_end[(100000, 1024, 0.01)] |
4 µs | 3.2 µs | +25.61% |
| ❌ | Simulation | decompress_rd[f64, (10000, 0.1)] |
121.8 µs | 136.6 µs | -10.83% |
Comparing rk/statssmallvec (dbd087e) with develop (115b3ba)
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