|bool empty() const||
|size_type size() const||
Returns: Number of items in *this.
Though the current implementation takes time O(1), possible future implementations might take time O(P), where P is the number of hardware threads.
|size_type max_size() const||
Returns: Upper bound on number of items that *this can hold.
The upper bound may be much higher than what the container can actually hold.
The following table provides additional information on the members of the concurrent_unordered_map and concurrent_unordered_multimap template classes.
For more complete information about compiler optimizations, see our Optimization Notice.