Issue ID: 16495
Summary: __traits(fullyQualifedName) instead of
std.traits.fullyQualifiedName has been identified as a significant slowdown
during compile time. The implementation does a whole ton of analysis to
reconstruct the requested name.
The compiler already has this information though. Implementing as a trait and
rewriting std.traits.fullyQualifiedName to use that will result in a solid
speed up of compile times.