第4章：类型系统——值类型与引用类型的性能奥秘

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4.1 栈与堆：内存分配的两个世界

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4.2 struct的设计哲学与黄金法则

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4.3 readonly struct与防御性拷贝

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4.4 ref struct与stackalloc：栈上乾坤

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4.5 in参数修饰符：避免大struct的拷贝开销

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4.6 ref returns与ref locals：返回与操作引用

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4.7 装箱与拆箱：性能的隐形杀手

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4.8 泛型与接口：彻底告别装箱时代

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本章总结

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思考题

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实践练习

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第5章：字符串与文本处理