From: Warren Young
Date: December 1 2007 6:25am
Subject: Re: Eyeballs needed on new reference counted pointer template
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Jonathan Wakely wrote:
> checking if (this ==&rhs) on *every* assignment is
> what's really wasteful.  In 99.9% of assignments the rhs.use_count()
> goes up, and this->use_count() goes down.  It's only wasteful in the
> 0.1% of cases where this == &rhs and the same refcount goes up and
> down.

okayfine :)

I was just confused about whether the T* case was implicitly protected. 
  I've deconfused (confissioned?) myself now.