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Opt-in direct I/O reads, and what segment alignment is actually worth - #9838

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claude/direct-io-reads-perf-3b5kk2
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Opt-in direct I/O reads, and what segment alignment is actually worth#9838
joseph-isaacs wants to merge 4 commits into
developfrom
claude/direct-io-reads-perf-3b5kk2

bench: run CI benchmarks with direct I/O and 4 KiB segment alignment

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CodSpeed HQ / CodSpeed Performance Analysis succeeded Sep 11, 2026 in 0s

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.

⚡ 1 improved benchmark
✅ 2238 untouched benchmarks
⏩ 176 skipped benchmarks1
🗄️ 1 archived benchmark run2

Performance Changes

Mode Benchmark BASE HEAD Efficiency
WallTime deferred_i64_avx512[PerRowPerRow] 11.6 µs 9.9 µs +16.78%

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Curious why performance improved? Comment @codspeedbot explain why performance improved on this PR, or directly use the CodSpeed MCP with your agent.


Comparing claude/direct-io-reads-perf-3b5kk2 (0a5e328) with develop (2dffb68)

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Footnotes

  1. 176 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.

  2. 1 benchmark was run, but is now archived. If it was deleted in another branch, consider rebasing to remove it from the report. Instead if it was added back, click here to restore it.