<DRAFT> IN LIST optims#19390

Draft

geoffreyclaude wants to merge 9 commits intoapache:mainfrom

geoffreyclaude:perf/in_list_optims

Commits on Feb 6, 2026

Replace InList benchmarks with strategy-focused coverage
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Refactor InListExpr to use modular StaticFilter architecture
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Implement Bitmap Filter for UInt8 (Stack-based)
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Extend Bitmap Filter to UInt16 (Heap-based)
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Implement Zero-Copy Reinterpretation and enable Int8/Int16 Bitmaps
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Implement Branchless Filter for small primitive lists
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Implement Direct Probe (Hash) Filter for large primitive lists
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Implement String View (Utf8View/BinaryView) Optimizations
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Implement Legacy String Optimization (Utf8TwoStageFilter)
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