std::unordered_set<Key,Hash,KeyEqual,Allocator>:: load_factor

From cppreference.com

float load_factor ( ) const ;
(since C++11)

Returns the average number of elements per bucket, that is, size() divided by bucket_count() .

Parameters

(none)

Return value

Average number of elements per bucket.

Complexity

Constant.

See also

manages maximum average number of elements per bucket
(public member function)