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[WIP] Bump Apache DF to 55 - #9334

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[WIP] Bump Apache DF to 55#9334
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adamg/df-55

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CodSpeed HQ / CodSpeed Performance Analysis failed Aug 14, 2026

Performance Regression: -0.27%

⚠️ 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.

⚡ 3 improved benchmarks
❌ 4 regressed benchmarks
✅ 2030 untouched benchmarks
⏩ 46 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation compress_fsst[(1000, 64, 8)] 1 ms 1.2 ms -12.44%
Simulation compact[(4096, 90)] 1.6 µs 1.8 µs -10.89%
Simulation compact_sliced[(4096, 90)] 1.7 µs 1.9 µs -10.51%
Simulation compact[(16384, 90)] 1.8 µs 2 µs -10.12%
Simulation cold_misaligned[(64, 256)] 5.3 ms 4.4 ms +20.1%
Simulation map_each[BufferMut<i32>, 128] 1,060.1 ns 928.2 ns +14.22%
WallTime words_gather_scalar[65536] 9.4 µs 8.2 µs +13.95%

Tip

Investigate this regression by commenting @codspeedbot fix this regression on this PR, or directly use the CodSpeed MCP with your agent.


Comparing adamg/df-55 (7152f4c) with develop (15c73f3)

Open in CodSpeed

Footnotes

  1. 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.