Re: vc-dir operation is very slow on large git repositories in Emacs 26.1

[Dmitry Gutov]

On 6/27/18 6:12 PM, Eli Zaretskii wrote:

> > So I think we should try it and see if anything broken comes up?
>
> Yes.  Although I'm slightly scared because the man pages say
>
>    OPTIONS
>      -c
>      --cached
>        Show cached files in the output (default)
>    ...
>      -u
>      --unmerged
>        Show unmerged files in the output (forces --stage)
>
> which doesn't sound equivalent to me.  But then I can never understand
> the Git documentation well enough to be sure what it says...

We don't need equivalent. The first option returns *all* files in the 
repository, which we want to get away from.

> > Eli, OK for emacs-26?
>
> If you are sure -c and -u are equivalent here, yes, please.

It works in my testing. But if I were 100% sure, I wouldn't be asking.

Pushed, with a couple more tweaks (orthogonal ones).