This is a faster but less expandable version of Class::Accessor::Fast.
Class::Accessors generated accessors require two method calls to accompish
their task (one for the accessor, another for get() or set()).
Class::Accessor::Fast eliminates calling set()/get() and does the access itself,
resulting in a somewhat faster accessor.
Class::Accessor::Faster uses an array reference underneath to be faster.
Read the documentation for Class::Accessor for more info.