How does the evacuation process of elements in a Map data structure occur during insert or delete operations?

In Go, the data structure map is implemented as a hash table. When inserting or deleting elements, reallocation (evacuation) of elements occurs when the size of the map reaches a certain threshold to maintain performance.

The evacuation process works as follows:

• When the number of elements increases and the load factor threshold is reached, a new, larger table is created.
• Elements from the old table are gradually copied (evacuated) into the new one.
• During this process, insert and search operations can work with both tables to ensure consistency.

This approach helps avoid sudden delays during reallocation and ensures efficient operation of the map even with dynamic size changes.

Internal implementation details may vary between Go versions, but the general principle — gradual migration of elements when increasing size — remains the same.