[0126] 优化 smart_font 字体加载性能#3361
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通过缓存避免字体加载过程中的重复调用： 1. 添加 maybe_initialize_font，避免对已初始化子字体重复调用 initialize_font 2. 缓存 family tokenize 结果，避免 resolve 和 is_italic_prime 中重复分割字符串 3. 缓存 logical_font 结果，避免 resolve(c, fam, attempt) 中重复计算 4. 缓存 is_italic_prime 的结果 同时添加 test_performance 和 test_math_performance 回归测试。 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
通过缓存避免 smart_font 字体加载过程中的重复函数调用：
maybe_initialize_font：在resolve和resolve_rubber中，避免对已初始化的子字体重复调用initialize_fontfamily_tokens：在构造函数中缓存trimmed_tokenize(family, ",")结果，避免resolve(string c)和is_italic_prime中重复分割字符串given_font：在构造函数中缓存logical_font结果，避免resolve(c, fam, attempt)中重复计算is_italic_prime结果：避免对同一字体的斜体引号判断重复计算Test plan
xmake r smart_font_test全部通过（11 个测试用例）test_performance和test_math_performance回归测试覆盖大量字符解析场景🤖 Generated with Claude Code