bug#23377: 25.0.93; Completion is extremely slow for insert-char

[Eli Zaretskii]

> Cc: Drew Adams <drew.adams@oracle.com>, "N. Jackson" <nljlistbox2@gmail.com>,
>  23377@debbugs.gnu.org, Eli Zaretskii <eliz@gnu.org>
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Tue, 26 Apr 2016 08:49:39 -0700
> 
> On 04/26/2016 04:51 AM, Stefan Monnier wrote:
> > It's not adding a feature.  It's disabling a feature with an easy to use
> > switch to re-enable it.
> > Don't make it a defcustom, just a defvar.
> 
> OK, thanks, that's easy. Proposed patch (to emacs-25) attached.

The patch is okay for emacs-25, but the default value of the variable
should be non-nil.

Thanks.