On Sun, Sep 19 2010, Lars Magne Ingebrigtsen wrote:

> Actually, this takes a large performance hit, so I don't think it should
> be done.  Deleting/inserting something in a buffer moves the buffer gap
> around, while subst-in-region does not.  If you're in a summary buffer
> with 10K articles, and you hit `C', you'll get 10K buffer gap movements,
> and it'll be very slow.

I'll take a look at performance.
Otherwise, if you do have an alternative, please let me know. :)

-- 
Julien Danjou
// ᐰ <julien@danjou.info>   http://julien.danjou.info