Compiler Resource Patterns: will "?*" slows down compilation? Follow

"File | Settings | Project Settings | Compiler | Resources Patterns"
By default it includes only a few file types (properties, xml, etc.).

From time to time I find myself wondering why a certain resource is not available at runtime even though it's in my classpath (in a source directory).
So I changed the "Resource Patterns" to "?*" (everything).

Is there a reason why this is not the default?
Specifically, will my compilation/make/build take a lot longer with "?*" ?