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>
29 lines
546 B
Plaintext
29 lines
546 B
Plaintext
PROCEDURE Main()
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USE "cdx_bench" NEW
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SET INDEX TO "cdx_bench.cdx"
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? "Tags:", OrdCount()
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? "Order1:", OrdName(1)
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? "Order2:", OrdName(2)
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? "Order3:", OrdName(3)
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SET ORDER TO 3
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? "Current:", IndexOrd()
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GO TOP
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? "Top:", RecNo(), EOF(), BOF()
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? "Name:", RTrim(FieldGet(2))
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SKIP
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? "Skip:", RecNo(), EOF()
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SET ORDER TO 1
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GO TOP
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? "City top:", RecNo(), RTrim(FieldGet(3)), EOF()
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SET ORDER TO 0
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GO TOP
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? "Natural:", RecNo(), LTrim(Str(FieldGet(1)))
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? "RC:", RecCount()
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CLOSE ALL
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RETURN
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