Explicit Instantiations
	• Clients can cause explicit instantiations to take place by placing the keyword template in front of a class name when defining objects. • Explicit instantiations can be used to improve the performance of our compiles and links. • It can be used to support better code generation and faster and more predictable compile and link times. • The drawback is that a template class can only be explicitly instantiated once, for a particular set of template actual arguments.