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Date: Sun, 22 Aug 2010 10:57:04 +0200
From: Angelo Graziosi <angelo DOT graziosi AT alice DOT it>
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To: Cygwin <cygwin AT cygwin DOT com>
Subject: Re: [ANNOUNCEMENT] Updated: cygwin-1.7.6-1
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Larry Hall wrote:
>> Corinna Vinschen wrote:
>>> - Improve performance of stat and a few other functions.  ls(1) should
>>>   be up to 30% faster
>>
>> I have a directory (500MB, 30 files) which contains mainly 'exe' (setups for TB, FF, OO etc.). If I try 'ls -l' in this directory, the first time it take about 30 seconds to list the files. After the first time, the listing is almost without delay. The same happens also with 'ls -l /usr/bin'.
>>
>> When there is the 'hang' (30 secs.), Task Manager shows that AVG9 takes about 50% of CPU: this occurs *only* with 1.7.6 but _not_ with 1.7.5, with which 'ls -l' is almost immediate, regardless of the number and type of files.
>>
>> Obviously I have tested this, each time, with a 'fresh machine', to avoid 'cache' effects.
>>
>> The system is WinXP SP3, AMD Athlon 64X2DC 2.03GHz, 1.75GB RAM.
>
> Try a recent snapshot:
>
> <http://cygwin.com/snapshots/>

I have tried cygwin1-20100822.dll.bz2, but same results. :(

The first time (no cache 'effects') I do

$ time ls -lrt /usr/bin

the results are:

CYGWIN_NT-5.1  1.7.5(0.225/5/3) 2010-04-12 19:07 i686 Cygwin
time ls -lrt /usr/bin
real    0m16.531s
user    0m0.108s
sys     0m0.421s

CYGWIN_NT-5.1  1.7.6(0.230/5/3) 2010-08-16 16:06 i686 Cygwin
real    1m3.171s
user    0m0.155s
sys     0m0.702s

CYGWIN_NT-5.1  1.7.6s(0.231/5/3) 20100822 02:25:11 i686 Cygwin
real    1m4.218s
user    0m0.280s
sys     0m0.609s

Ciao,
Angelo.


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