http://qs321.pair.com?node_id=150150


in reply to Re: Re: Re: Re: Re: has it been blessed?
in thread has it been blessed?

The reason I wrote it that way is that ref($obj) is a single-opcode operation, much less expensive than the execution of UNIVERSAL::isa($obj, 'UNIVERSAL'). Unless you know for certain that the value being tested will a reference the majority of the time, then you can save a reasonable amount of execution time with ref() coupled with the short-circuiting and operator. I stand behind this one.

--rjray