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perf(layout): share a flat layout's decode across the splits reading it - #10272

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joseph-isaacs wants to merge 2 commits into
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perf(layout): skip the segment request when a shared decode is reused

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CodSpeed / CodSpeed Performance Analysis succeeded Oct 3, 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.

⚠️ Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
✅ 2102 untouched benchmarks
⏩ 503 skipped benchmarks1

Performance Changes

Mode Benchmark BASE HEAD Efficiency
⚡ Simulation density_sweep_single_slice[0.9] 50.8 µs 33.4 µs +51.99%

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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 ji/flat-shared-decode (382588e) with develop (9a08b82)

Open in CodSpeed

Footnotes

  1. 503 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. ↩