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Re: File operations really slow in emacs
On Feb 14 12:46, Ryan Johnson wrote:
> On 14/02/2012 11:26 AM, Corinna Vinschen wrote:
> >On Feb 14 10:47, Ryan Johnson wrote:
> >>On 14/02/2012 10:17 AM, Corinna Vinschen wrote:
> >>>Does anybody know a system call which allows to fetch the network drive
> >>>state (connected/not connected) without a billion microsecond timeout?
> >>[...]
> >>What if we parsed the mount table instead of calling readdir? I
> >>don't know how that's computed, but it's never been a performance
> >>problem, it only shows drives that are actually connected [...]
> >What mount table? Cygwin's? It calls GetFileAttributes on the drive's
> >root dir as well...
> This is bizarre... what would cause calls to the same Windows API
> function behave so differently when called by stat vs ls vs
> bash-autocomplete? I'm happy to accept that there's some weirdness
> on my box, but I would have expected that weirdness to be consistent
> at any given instant in time (either all go slow or all behave
> normally).
SMB just is not consistent. More often than not the timing behaviour is
just plain puzzeling. And, btw., in *my* testing I got hangs in mount
as well if I disabled the remote share. But only once. Subsequent
calls were fast. And after enabling the remote share, mount happily
ignored that fact for about a minute or so. Caching, anybody?
Corinna
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Project Co-Leader cygwin AT cygwin DOT com
Red Hat
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