feat(io): try RWF_NOWAIT for medium/large buffered reads before hitting the blocking pool - #9409
feat(io): try RWF_NOWAIT for medium/large buffered reads before hitting the blocking pool#9409joseph-isaacs wants to merge 1 commit into
Performance Regression: -3.64%
⚠️ 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
❌ 3 regressed benchmarks
✅ 1989 untouched benchmarks
⏩ 89 skipped benchmarks1
Warning
Please fix the performance issues or acknowledge them on CodSpeed.
Performance Changes
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ❌ | Simulation | decompress[u64, (10000, 4)] |
310.2 µs | 401.7 µs | -22.77% |
| ❌ | Simulation | decompress[u64, (1000, 16)] |
64.4 µs | 72.8 µs | -11.57% |
| ❌ | Simulation | take[small_m/shuffled/primitive/nonnull/chunks=16384/indices=16] |
1 ms | 1.2 ms | -11.31% |
| ⚡ | Simulation | cold_misaligned[(64, 256)] |
5.3 ms | 4.4 ms | +20.33% |
| ⚡ | WallTime | words_gather_scalar[65536] |
9.4 µs | 8.3 µs | +13.99% |
Tip
Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.
Comparing claude/rwf-nowait-buffered-io-f03rqx (0752dee) with develop (dc8df2e)
Footnotes
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89 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. ↩