Какое поведение ожидается, если исключить механизм copy-on-write из структуры данных?

The copy-on-write (COW) mechanism in data structures allows for efficient memory management by delaying data copying until modification occurs. If this mechanism is removed, every copy operation of a data structure will immediately create a full copy, leading to significant memory usage and reduced performance.

For example, in Swift, collections such as Array or Dictionary use COW so that copying does not duplicate data immediately, but only upon modification. Without COW, copying an array of 1000 elements will always create a new array in memory, even if it remains unchanged, which is inefficient.

Thus, without copy-on-write:

• Memory usage increases.
• Performance decreases due to frequent copying.
• Flexibility and optimization when working with immutable data are lost.