bug#21969: VC opens new window to display minimal messages

[Eli Zaretskii]

> From: Dmitry Gutov <dgutov@yandex.ru>
> Date: Sat, 28 Nov 2015 02:50:42 +0200
> Cc: 21969@debbugs.gnu.org
> 
> On 11/28/2015 12:26 AM, Daniel Colascione wrote:
> 
> > Believe me, any VCS will be slow once you throw enough files at it. I've
> > had to disable Emacs Mercurial integration because I was sick of waiting
> > three seconds for hg status -A and hg log -l1 --template '{rev}' to run
> > every time I visited a file. I've been working on a _very_ large repository.
> 
> Sure, you can make anything slow if you try hard enough. But if 'hg 
> status' is that slow, you won't try to use vc-diff at all in that 
> repository, will you? Then the sync vs async question is moot.
> 
> And there's a difference in that you'd often prefer not to wait for the 
> status operation to finish, but the user has to invoke vc-diff 
> explicitly. It's not like they're going to switch to another task while 
> waiting for the asynchronous result, right?

Given the controversy, would it make sense to have an option that
controls this behavior?