mmap for file reads#8450
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CodSpeed HQ / CodSpeed Performance Analysis
succeeded
Jun 16, 2026
Performance Gate Passed
⚠️ 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.
⚡ 4 improved benchmarks
✅ 1541 untouched benchmarks
⏩ 10 skipped benchmarks1
Performance Changes
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ⚡ | Simulation | decompress_rd[f64, (10000, 0.01)] |
137.7 µs | 107.2 µs | +28.41% |
| ⚡ | Simulation | decompress_rd[f64, (10000, 0.0)] |
138.3 µs | 107.8 µs | +28.25% |
| ⚡ | Simulation | decompress_rd[f64, (10000, 0.1)] |
138.1 µs | 111.6 µs | +23.79% |
| ⚡ | Simulation | varbinview_large |
131.2 µs | 112.7 µs | +16.42% |
Tip
Curious why this is faster? Comment @codspeedbot explain why this is faster on this PR, or directly use the CodSpeed MCP with your agent.
Comparing myrrc/temp-mmap (a1510c1) with develop (e1c6ef5)
Footnotes
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10 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. ↩
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