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

[Dmitry Gutov]

On 6/28/18 4:21 PM, Sergey Organov wrote:

> In fact it could be that
>
> $ git status -z
>
> is the way to go, even though it will need changes in parsing.
>
> Here is quote from 'git help status', for quick reference:
>
>         -z
>             Terminate entries with NUL, instead of LF. This implies the
>             --porcelain output format if no other format is given.
> [...]
>
>         --porcelain
>             Give the output in an easy-to-parse format for scripts. This is
>             similar to the short output, but will remain stable across Git
>             versions and regardless of user configuration. See below for
>             details.
>
>
> The output format is then carefully described later in the man-page.

Switching over to 'git status porcelain=v2' is a bigger enterprise, and 
we only want to do that after Git 2.11.0 (where version 2 was 
introduced) is old enough.