Steve Yegge 25644d9717 Cache compiled regexes in ID replacement for 1.9x performance boost ...

Implements bd-27: Cache compiled regexes in replaceIDReferences for performance

Problem:
replaceIDReferences() was compiling regex patterns on every call. With 100
issues and 10 ID mappings, that resulted in 4,000 regex compilations (100
issues × 4 text fields × 10 ID mappings).

Solution:
- Added buildReplacementCache() to pre-compile all regexes once
- Added replaceIDReferencesWithCache() to reuse compiled regexes
- Updated updateReferences() to build cache once and reuse for all issues
- Kept replaceIDReferences() for backward compatibility (calls cached version)

Performance Results (from benchmarks):
Single text:
- 1.33x faster (26,162 ns → 19,641 ns)
- 68% less memory (25,769 B → 8,241 B)
- 80% fewer allocations (278 → 55)

Real-world (400 texts, 10 mappings):
- 1.89x faster (5.1ms → 2.7ms)
- 90% less memory (7.7 MB → 0.8 MB)
- 86% fewer allocations (104,112 → 14,801)

Tests:
- All existing tests pass
- Added 3 benchmark tests demonstrating improvements

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

2025-10-13 23:50:48 -07:00

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