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

[Stefan Monnier]

> Thanks, I reproduced the problem and yes, it is wayyy too slow. Also, the
> code in question has some FIXMEs that have not been fixed. Since we're
> trying to push out a new release, at this point we should probably revert
> the relevant change and think about how to do this sort of thing in a better
> way in a later release. Proposed patch attached.

Seems like a better way forward is to add a config var, which defaults
to disabled.


        Stefan