Add basic JSONBench-based benchmark #8340
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CodSpeed HQ / CodSpeed Performance Analysis
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Jun 10, 2026
Performance Regression: -10.62%
⚠️ 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.
⚡ 2 improved benchmarks
❌ 6 regressed benchmarks
✅ 1519 untouched benchmarks
Warning
Please fix the performance issues or acknowledge them on CodSpeed.
Performance Changes
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ❌ | Simulation | chunked_bool_canonical_into[(1000, 10)] |
31.9 µs | 46.8 µs | -31.82% |
| ❌ | Simulation | decompress_rd[f64, (100000, 0.0)] |
845.8 µs | 1,024.6 µs | -17.45% |
| ❌ | Simulation | chunked_varbinview_into_canonical[(1000, 10)] |
177.2 µs | 213.3 µs | -16.95% |
| ❌ | Simulation | decompress_rd[f32, (100000, 0.0)] |
499.5 µs | 587 µs | -14.91% |
| ❌ | WallTime | cuda/bitpacked_u8/unpack/3bw[100M] |
300 µs | 349.9 µs | -14.25% |
| ❌ | Simulation | chunked_varbinview_canonical_into[(100, 100)] |
274.7 µs | 309.5 µs | -11.26% |
| ⚡ | Simulation | decompress_rd[f64, (100000, 0.01)] |
981.6 µs | 846 µs | +16.03% |
| ⚡ | Simulation | decompress_rd[f64, (100000, 0.1)] |
981.5 µs | 846 µs | +16.02% |
Tip
Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.
Comparing adamg/compress-json-bench (1e1a170) with adamg/json-arrow-export (5430d3a)
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