Re: emacs-27 e1e0a7a 2/2: xref--collect-matches: Speed up on remote

[Michael Albinus]

Stefan Monnier <address@hidden> writes:

>>> It does go through Tramp for the initial `expand-file-name`, but AFAIK
>>> this shouldn't need to talk to the remote host (unless it has a ~/ or
>>> ~<user>/ in the remote part of the name, I guess?).
>> That's how it is implemented, yes. However, remote file names with a
>> relative localname part, are also expanded via prepending "~/" to the
>> localname. For performance reasons it is better to avoid such file names.
>
> In the context of `xref--collect-matches`, I'd expect the file name passed
> to `get-file-buffer` to be either fully expanded file names or relative
> file names (with a fully expanded `default-directory`), so in that case
> `expand-file-name` should presumably "always" return without contacting
> the remote host, right?

Should be, yes. And according to some short tests, Tramp behaves like this.

>         Stefan

Best regards, Michael.