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  • Swift 的值类型, 引用类型, 内存管理

    • ⦿swift
    • ⦿value-type
    • ⦿reference-type
    • ⦿memory-management
    • 2020-03-15
    • 👓 4 min

    值类型和引用类型相比, 最大优势可以高效的使用内存, 值类型在栈上操作, 引用类型在堆上操作, 栈上操作是数据的完全替换, 而堆上操作牵涉到合并 / 位移 / 重链接, Swift 大量使用值类型的设计减少了堆上内存分配和回收次数, 同时使用 copy-on-write 将值传递与复制开销降到最低

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