[0124] 缓存表格 lazy cells 状态，避免 position_columns 重复扫描#3359
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在 table_rep 中新增 has_lazy_cells 标志位，在 typeset_row 阶段缓存 是否存在 lazy stream 单元格，替换 position_columns 中 O(nr_rows * nr_cols) 的双重循环扫描。同时 handle_decorations 中传播子表格和 decoration 的 lazy cells 状态。 - table.hpp: 新增 bool has_lazy_cells 字段 - table.cpp: 初始化/设置/传播/使用该标志 - table_performance_test.cpp: 新增 2 个单元测试验证标志正确性 - devel/0124.md, 0124.tmu: 任务文档和测试文档 Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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Summary
table_rep中新增has_lazy_cells标志位，在typeset_row阶段缓存是否存在 lazy stream 单元格position_columns中O(nr_rows * nr_cols)的双重循环扫描handle_decorations中传播子表格和 decoration 的 lazy cells 状态0124.tmu测试文档Test plan
xmake b table_performance_test构建通过xmake r table_performance_test全部 21 个测试通过has_lazy_cells为falsehas_lazy_cells为true🤖 Generated with Claude Code