Fix remaining flaky CodSpeed microbenchmarks#8861
Merged
Merged
CodSpeed HQ / CodSpeed Performance Analysis
failed
Jul 20, 2026
Performance Regression: -16.43%
❌ 6 regressed benchmarks
✅ 1662 untouched benchmarks
⏩ 46 skipped benchmarks1
Warning
Please fix the performance issues or acknowledge them on CodSpeed.
Performance Changes
| Mode | Benchmark | BASE |
HEAD |
Efficiency | |
|---|---|---|---|---|---|
| ❌ | Simulation | decompress[u64, (1000, 16)] |
22.6 µs | 31.1 µs | -27.3% |
| ❌ | Simulation | decompress[u8, (1000, 4)] |
24.5 µs | 31.3 µs | -21.55% |
| ❌ | Simulation | decompress[u8, (10000, 4)] |
96 µs | 111.6 µs | -13.93% |
| ❌ | Simulation | decompress_utf8[(1000, 4)] |
37.5 µs | 43.5 µs | -13.71% |
| ❌ | Simulation | take_indices[(10000, 256)] |
57.3 µs | 64.1 µs | -10.63% |
| ❌ | Simulation | take_indices[(1000, 4)] |
49.2 µs | 54.7 µs | -10.03% |
Tip
Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.
Comparing claude/codspeed-flaky-benchmarks-4vapbm (1902072) with develop (b7b01d3)
Footnotes
-
46 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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