16.1.5. Controlling Instantiations
The fact that instantiations are generated when a template is used (§ 16.1.1, p. 656) means that the same instantiation may appear in multiple object files. When two or more separately compiled source files use the same template with the same template arguments, there is an instantiation of that template in each of those files.
In large systems, the overhead of instantiating the same template in multiple files can become significant. Under the new standard, we can avoid this overhead through an explicit instantiation ...
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