Re: 22.1.50; insert-file-contents is slow under tramp

[David Kastrup <dak@gnu.org>]

Michael Albinus <michael.albinus@gmx.de> writes:

> Stefan Monnier <monnier@iro.umontreal.ca> writes:
>
>>> Yes. I've installed a patch in the trunk, which makes a fast track for
>>> "remote" files being on localhost.
>>
>> How does that work?  I mean when accessing files on the localhost with
>> Tramp, the most likely situation I can think of is the `su' method so how
>> what does your "fast track" do to transfer the file faster?  Does it copy it
>> to /tmp at the "remote" end, then make it world-readable, then copy it on
>> the "local" end, then remove it at the remote end?
>
> Similar approach. It calls `tramp-do-copy-or-rename-file-directly',
> which copies the "remote" file to /tmp, and assigns proper
> permissions.  Then `insert-file-contents' for the _local_ temporary
> file is applied, which shows the file in the buffer, and the
> temporary file is deleted.

For the su and sudo functions, in many (but not all) cases the file is
actually world-readable (things like /etc/fstab or /etc/passwd).
Making use of that would probably be by far the fastest way for
getting the file.

Do you do this already?

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum