Is the search time for an element by key in a data structure Map constant in all cases?

The average time to search for an element by key in a Go map is considered constant (O(1)), but in the worst case, it can increase.

This is because the map in Go is implemented based on a hash table. With an ideal hash distribution, search is very fast, but in case of collisions (when different keys have the same hash), access time can degrade to linear.

Nevertheless, the Go runtime optimizes map operations to minimize such cases, so in practice, search time is close to constant.

Example of using a map:

m := make(map[string]int)
m["apple"] = 5
value, ok := m["apple"]
if ok {
    fmt.Println("Value:", value)
}

Here, access to the element by the key "apple" occurs very quickly.