bug#5833: 23.1.94; Opening files on network shares on w32 is slow

[Stefan Monnier]

>>>> (setq locate-dominating-stop-dir-regexp "")
>>> That maybe shaves off half a second.
>> Hmm... odd.  That seemed like a pretty good guess
>> (locate-dominating-file tends to suffer from such performance problems
>> in some cases, and vc-handled-backends is one user of this function,
>> and dir-locals is another, so setting locate-dominating-stop-dir-regexp
>> should really kill it off).
> I think it odd that it shaved time off rather than made things much worse.

The "" regexp always matches, so it will cause locate-dominating-file to
stop at the first occasion.


        Stefan