What is the fastest way to figure out if an
unordered_map container has an item with a specified key?
They will have about equal performance. You should use the algorithm that best expresses what you are trying to do.
To elaborate on that, generally
count() will be implemented using
find(). For example, in libcxx,
count() is implemented as
return (find(__k) != end());
Answered By – Bill Lynch
Answer Checked By – Pedro (BugsFixing Volunteer)