Re: Missing snprintf in ucrt mingw + vc-refresh in find-file hook?

[Dmitry Gutov <dmitry@gutov.dev>]

On 12/02/2024 18:49, Eli Zaretskii wrote:
>> Date: Mon, 12 Feb 2024 16:58:52 +0200
>> Cc:emacs-devel@gnu.org
>> From: Dmitry Gutov<dmitry@gutov.dev>
>>
>>>> To have the mode-line indicator up-to-date, I imagine.
>>> (setq vc-handled-backends nil) solved it. I would prefer such an expensive
>>> feature to be opt-in not opt-out, or at least better advertised so I don't have
>>> to find by a chance what Emacs is doing in the background; thanks.
>> The fact of the matter is, it's relatively expensive only on certain
>> platforms, but much less so on the main one that we keep in mind when
>> developing Emacs (GNU/Linux).
> If by "certain platforms" you mean MS-Windows, then the command shown

Yes.

> in the backtrace posted by Arthur takes between 24 and 30 msec here.

If there are several calls required (I don't remember how many we have 
now), 30x4 can turn into a 120ms delay, which would be perceptible 
enough and fairly annoying.

One of the other problems I recall is that the Git distribution at the 
time added a shell script called git.bat (or git.cmd, something like 
that), and that extension took priority over git.exe in the path lookup. 
And launching that was an order of a magnitude slower than using git.exe 
directly.