GNU bug report logs - #24126
vc-hg-state can be extremely slow

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From: Jonathan Kotta <jpkotta <at> gmail.com>
To: Dmitry Gutov <dgutov <at> yandex.ru>
Cc: 24126 <at> debbugs.gnu.org
Subject: bug#24126: vc-hg-state can be extremely slow
Date: Tue, 2 Aug 2016 10:57:33 -0500

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On Tue, Aug 2, 2016 at 8:32 AM, Dmitry Gutov <dgutov <at> yandex.ru> wrote:

> On 08/01/2016 09:40 PM, Jonathan Kotta wrote:
>
>> Emacs uses `hg status -A` in vc-hg-state, which in turn is used in many
>> vc commands (e.g. vc-root-diff).  The "-A" option makes mercurial look
>> at all files under the directory, even the ignored ones.  If there are a
>> lot of ignored files, this will be very slow.
>>
>
> Why does it do that? We're passing a specific file name to it.
>

In the case of `vc-root-diff` at least, it's passing in a directory; the
command is essentially `hg status -A ./`, and the CWD is indeed the repo
root.  I did this by running `vc-root-diff` from a dired buffer visiting
the repo root.

-- 
Thanks,

Jonathan Kotta

Hofstadter's Law:
    It always takes longer than you expect, even
    when you take into account Hofstadter's Law.

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