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Evaluate LIKE over filtered inputs filter-first#8580

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ngates/onpair-split-2-like-filter-first
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Evaluate LIKE over filtered inputs filter-first#8580
gatesn wants to merge 1 commit into
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ngates/onpair-split-2-like-filter-first

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@gatesn

@gatesn gatesn commented Jun 24, 2026

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This is an interesting experiment because it demonstrates when we do/don't want filter push-down and how it largely depends on the cost of the expression...

Signed-off-by: Nicholas Gates <nick@nickgates.com>
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codspeed-hq Bot commented Jun 24, 2026

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Merging this PR will not alter performance

⚠️ 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.

⚡ 4 improved benchmarks
❌ 2 regressed benchmarks
✅ 1583 untouched benchmarks
⏩ 4 skipped benchmarks1

Warning

Please fix the performance issues or acknowledge them on CodSpeed.

Performance Changes

Mode Benchmark BASE HEAD Efficiency
Simulation copy_nullable[65536] 1 ms 1.4 ms -24.25%
Simulation copy_non_nullable[65536] 908.4 µs 1,089 µs -16.58%
Simulation encode_varbin[(1000, 4)] 157 µs 138.3 µs +13.52%
Simulation encode_varbin[(1000, 2)] 156.1 µs 138 µs +13.14%
Simulation encode_varbin[(1000, 8)] 157.3 µs 139.1 µs +13.05%
Simulation encode_varbin[(1000, 32)] 162.5 µs 145.2 µs +11.85%

Tip

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


Comparing ngates/onpair-split-2-like-filter-first (2b5ece2) with develop (2a19323)

Open in CodSpeed

Footnotes

  1. 4 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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