How does the growth of Bucket objects occur during the evacuation process in the system?

In Go, when working with hash tables (maps), a mechanism called evacuation is used at runtime to redistribute elements when the table size increases.

Bucket objects are structures that store key-value pairs. During evacuation, elements are moved from old buckets to new ones.

The growth of the number of Bucket objects occurs as follows:

• When the hash table size increases, a new array of larger buckets is created.
• Evacuation happens gradually: elements from old buckets are copied to new ones.
• For each old table bucket, a corresponding bucket is created in the new table.
• During copying, if a new bucket already contains elements, additional overflow buckets are created to accommodate all data.

Thus, the number of buckets grows not only due to the increase in the main table but also because of the creation of overflow buckets during collisions and overflows.

This allows for efficient redistribution of data and helps maintain the performance of map operations.