Charles KWON OhJun
40935b6103
Ported from rddfive/cdx_engine.c cdx_leaf_decode_all(): - Replaced bit-by-bit extractBits loop with byte-level shift/mask - Read reqByte as little-endian integer, extract recNo/dup/trl via masks - 10x+ faster than per-bit extraction Leaf page decode cache: - Tag.cachedLeafOff/cachedLeafKeys: avoid re-decoding same leaf page - SkipNext/SkipPrev use getLeafKeys() with cache - GoTop/Seek populate cache on first decode CDX 50K benchmark (ext4): ┌──────────────┬──────────┬──────────┬──────────┐ │ CDX 50K │ Harbour │ Before │ After │ ├──────────────┼──────────┼──────────┼──────────┤ │ SCAN 50K │ 6ms │ 276ms │ 14ms │ ← 20x faster │ SCOPE 35K │ 4ms │ 238ms │ 20ms │ ← 12x faster │ SEEK NAME │ 27ms │ 362ms │ 239ms │ │ SEEK ID │ 18ms │ 320ms │ 195ms │ └──────────────┴──────────┴──────────┴──────────┘ CDX cross-read: 18/18 PASS. All unit tests PASS. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>