dc7544d944
Replace linear O(n) search with binary search O(log n) for unicode interval lookup. Korean fonts have many intervals (~30,000+ glyphs), so this improves text rendering performance during page navigation. ## Summary * **What is the goal of this PR?** (e.g., Fixes a bug in the user authentication module, Implements the new feature for file uploading.) Replace linear `O(n)` glyph lookup with binary search `O(log n)` to improve text rendering performance during page navigation. * **What changes are included?** - Modified `EpdFont::getGlyph()` to use binary search instead of linear search for unicode interval lookup - Added early return for empty interval count ## Additional Context * Add any other information that might be helpful for the reviewer (e.g., performance implications, potential risks, specific areas to focus on). - Performance implications: Fonts with many unicode intervals benefit the most. Korean fonts have ~30,000+ glyphs across multiple intervals, but any font with significant glyph coverage (CJK, extended Latin, emoji, etc.) will see improvement. - Complexity: from `O(n)` to `O(log n)` where n = number of unicode intervals. For fonts with 10+ intervals, this reduces lookup iterations significantly. - Risk: Low - the binary search logic is straightforward and the intervals are already sorted by unicode codepoint (required for the original early-exit optimization).
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