bug#50572: 28.0.50; [PATCH] fix VC to find the responsible backend with the most specific path.

[Dmitry Gutov]

On 10.11.2021 02:30, Lars Ingebrigtsen wrote:
> I've sloppily implemented a couple of times before for private usage),
> so I've now made a better version and called it 'file-name-split', which
> should hopefully work on all systems.

FWIW, it's not very fast with Tramp. Even just visiting a local file 
over the 'sudo' protocol,

  (benchmark 1 '(file-name-split buffer-file-name))

prints '0.013030s' here. With some random deviations based on GC.

Probably not terrible for this particular command, but a general "split 
file name" function could do better. I think.