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Add filter-and-scatter RowFn execution - #9521

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ct/row-fn-filter-scatter
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Add filter-and-scatter RowFn execution#9521
connortsui20 wants to merge 2 commits into
developfrom
ct/row-fn-filter-scatter

Use nullable indices to scatter row outputs

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CodSpeed HQ / CodSpeed Performance Analysis succeeded Aug 21, 2026

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

⚡ 3 improved benchmarks
✅ 1978 untouched benchmarks
⏩ 42 skipped benchmarks1

Performance Changes

Mode Benchmark BASE HEAD Efficiency
WallTime words_gather_scalar[65536] 9.4 µs 8.2 µs +13.74%
Simulation cold_misaligned[(16, 64)] 428.3 µs 382.1 µs +12.09%
Simulation compress_fsst[(500, 64, 8)] 585.9 µs 529.6 µs +10.62%

Tip

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


Comparing ct/row-fn-filter-scatter (685e0d2) with develop (fd538ff)2

Open in CodSpeed

Footnotes

  1. 42 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. No successful run was found on develop (951cdf7) during the generation of this report, so fd538ff was used instead as the comparison base. There might be some changes unrelated to this pull request in this report.