On 08/01/09 02:46, John Beckett wrote:
> Hugo Ahlenius wrote:
>> I have experienced an issue for quite some time, and now I
>> finally decided to deal with it - vim gets painfully slow
>> accessing files using UNC paths on Windows (paths that look
>> like \\server\share\folder \file). I have tested with Windows
>> XP and Vista on several machines.
>
> I don't use Vim like that, so haven't encountered the issue. Some random
> thoughts follow.
>
> First, I have seen issues about slow access to UNC paths years ago
> (nothing to do with Vim). There was some well-known issue about network
> provider order which was particularly apparent when people had enabled
> the Microsoft software to allow access to NetWare servers. Also, the
> first access can be slow due to a need for network authentication after
> the server has timed-out the client. However, you are probably not
> seeing these.
>
> In Vim's source code, we find function fname_case() in file os_win32.c.
> I have noticed that function has an amazing trick. When you provide a
> file path name to Vim (on Windows), Vim wants to determine the correct
> case (the "true name") for each component of the path. Irritatingly,
> Windows provides no assistance, so Vim has to start from the root and
> search for the first directory in the root to determine its true name.
> That is repeated for each component of the path.
>
> I haven't looked to see what happens with a UNC path, but Vim might use
> FindFirstFile on the \\server and/or the \\server\share components (as
> well as on following directory components). That might cause various
> timeouts, or certainly a slowdown.
>
> I mention all this in the hope that someone is inspired to do a bit of
> testing.
>
> John
I think I saw somewhere in the help that on Dos/Windows, Vim treats a
double backslash in a filename as identical to a single backslash;
however I cannot find it back
Best regards,
Tony.
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