Charles KWON OhJun
1b41384675
CDX internal node format fix: - Was: [child LE][recNo LE][key] (NTX-style) - Now: [key][recNo BE][child BE] (correct CDX format) - Fixes GoTop/Seek/Scan for large CDX files (50K+ records) CDX mmap: - syscall.Mmap on OpenIndex for zero-copy reads - idx.readAt() helper: mmap slice or file fallback - All ReadAt calls in Tag navigation replaced - Close: munmap CDX 50K benchmark (all counts correct): SEEK NAME 50K: 362ms (f=50000) SCAN 50K: 276ms (c=50000) SCOPE 35K: 238ms (c=35000) SEEK ID 50K: 320ms (f=50000) CDX is slower than NTX due to bit-packed leaf decompression per page. Cross-read test: 18/18 still PASS. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>