Re: incredibly slow file listing script on windoze 7 pro 4 core 64 bit

[mike marchywka <marchywka at gmail dot com>]

On 9/7/10, Larry Hall (Cygwin) <reply-to-list-only-lh@xxx.com> wrote:
> On 9/7/2010 12:05 PM, mike marchywka wrote:
>> this takes a few minutes on old debian machine, taking much longer
>> here on same data-
>> about 19k file about 24Gb total size.
>> Windoze finally has better perf stuff but still no help- one core at
>> 25 pct all kernel
>> time disk not exactly busy. All the time is in the "ls" loop not the
>> find command.
>> Now obbviously I expect the "ls" per file has to make a bunch of OS calls
>> for
>> each file but still even with cygwin layer seems a bit much.
>> Thanks.
>
> The problem is that Cygwin has to open all the files to stat when you
> use the '-l' flag.  Try without the flag to get the lower bound and see if
> that's better for you.  If so, maybe '-s' will suit your purpose.  Or
> even 'du'?

Sure, I could find a better way to do it but I was just curious about
performance
diffs. I've got this expensive 'doze laptop with 4 cores and the latest OS and
all and compared to this old emachines desktop with debian it seems a
bit slow. Now
maybe this is a bit of a contrived case, no one would really do this
and afterall
the new system may be optimized for real-life usages and of course cygwin can't
speed up obligatory OS calls.

Anyway yes du seems much faster and is quite reasonable :)

FWIW. Thanks.

>
> --

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple