Max OS X does not have gethrtime and as a result cannot load Time::HR
Sun Dec 21, 2008
I just discovered this after poking around for an inordinate amount of time.
The trick is to use Time::HiRes instead.
Now someone should write a bridge function that overloads the Time::HR
functions with Time::HiRes functions which would make a code change as easy
as loading the overload module.